Stackable bottle cap of edible mushroom culture bottle

Abstract

The utility model discloses a stackable bottle cap of an edible mushroom culture bottle, which relates to the technical field of edible mushroom culture equipment, and comprises a lower cap, an upper cap and an air filter, the lower cap is provided with a first air hole communicated with the top surface and the bottom surface and a plurality of second air holes on the side surface, the upper opening surface is provided with a positioning groove, and the diameter of the positioning groove is larger than that of the first air hole; the surface of the upper cover is a plane, the bottom face of the lower cover faces downwards and is arranged on the lower cover, a pressing ring is arranged in the lower cover and is matched with the positioning groove to press the air filtering piece, and a third air hole is formed in the side face of the pressing ring. The space utilization rate is improved. The holes in the side face form a complex airflow path, and air exchange is facilitated. The adhesion amount of bacteria and dust on the air filtering piece can be reduced, the air exchange efficiency is ensured, nutrition conversion is promoted, and the bacteria culture time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of edible fungus cultivation equipment, in particular to a bottle cap for a stackable edible fungus culture bottle. Background Art

[0002] Edible fungi, as a nutritious food, occupy a vital place in the human diet. With growing market demand, large-scale production of edible fungi has become an inevitable trend. Currently, plastic bag cultivation is a common method for growing edible fungi. This method is cost-effective and allows for flexible control of yield and mushroom shape based on cultivation preferences. The close fit of the bag opening and its tapered structure effectively reduce the formation of aged mushroom clumps, avoid the need for scratching, and lower production costs. Furthermore, the plastic bag conforms perfectly to the surface of the culture medium, preventing the formation of gaps and minimizing the production of aerial hyphae, which is beneficial for the growth of edible fungi. However, plastic bag cultivation also has significant drawbacks. Because plastic bags have no fixed shape, automation, standardization, and scalability are difficult to achieve during production. This not only increases labor costs but also reduces production efficiency, hindering the further development of the edible fungi industry.

[0003] Prior art CN111328637A discloses an edible fungus cultivation bottle and its cap, which includes an upper cover, a lower cover, and an air filter: the lower cover has a first vent hole connecting the top and bottom surfaces of the lower cover, the bottom surface of the lower cover has a first protrusion for being received in the bottle mouth of the bottle body, and the lower opening of the first vent hole is located on the first protrusion; the upper cover has a second vent hole connecting the top and bottom surfaces of the upper cover, the bottom surface of the upper cover faces the lower cover and covers the lower cover, and the air inside and outside the edible fungus cultivation bottle is exchanged through the first and second vent holes; the air filter is arranged in the air flow path of the bottle cover to filter the exchanged air. The structure of the above-mentioned bottle cover can effectively inhibit the growth of aerial hyphae. The ventilation structure of the bottle cover adopts an upper ventilation method, which has better air permeability, can effectively promote nutrient conversion, shorten the fungus cultivation time, and improve the yield and quality of edible fungi.

[0004] However, the prior art edible fungus cultivation bottle and its bottle cap have a first protrusion on the upper cover, resulting in an upward protrusion on the upper cover, which cannot realize the stacking and storage of bottles. At the same time, the structure and distribution position of the vent holes in the prior art adopt an upper ventilation method for air exchange, and in the upper ventilation mode of air exchange, air usually enters the bottle vertically. However, this easily forms a local one-way flow, making it difficult to achieve efficient air exchange in the entire bottle space. In addition, since the air enters the vent holes vertically, the bacteria and dust carried in the air are affected by gravity and are consistent with the air flow path, which will cause a large amount of bacteria and dust to quickly accumulate on the air filter, thereby causing the air filter to be blocked, which will further affect the air exchange rate. Utility Model Content

[0005] The purpose to be achieved by the present invention is to provide a stackable bottle cap for edible fungus culture bottles, which solves the problem that the ventilation holes in the prior art are opened above the upper cover and are provided with an upward protrusion, which makes it impossible to stack the bottles, and the prior art adopts an upward ventilation method, which easily forms a local one-way flow, has low air exchange efficiency, and the air enters the ventilation holes vertically. The bacteria and dust carried in the air are affected by gravity and are also consistent with the air flow path, which will cause a large amount of bacteria and dust to quickly accumulate on the air filter, thereby clogging the air filter and further affecting the air exchange rate.

[0006] In order to achieve the above object, the utility model adopts the following technical solution: a stackable edible fungus culture bottle cap, used to cover the bottle mouth of the edible fungus culture bottle, the bottle cap includes a lower cover, an upper cover and an air filter;

[0007] The lower cover has a first air vent communicating with the top and bottom surfaces of the lower cover, the first air vent having an upper opening surface and a lower opening surface that are opposite to each other, a plurality of second air vents are formed in a row around the side surface of the lower cover, the second air vents are parallel to the upper opening surface, and a positioning groove is further formed on the upper opening surface of the lower cover, the diameter of the positioning groove being larger than that of the first air vent;

[0008] The air filter is arranged in the positioning groove and covers the first air hole, and is used for filtering the exchanged air;

[0009] The upper surface of the upper cover is a planar structure, and the bottom surface of the lower cover is covered on the lower cover downwardly. A clamping ring is provided in the upper cover to cooperate with the positioning groove for clamping the air filter element, and a third air vent is provided on the side of the clamping ring.

[0010] Furthermore, the lower cover is a combination of an upper groove structure and a lower groove structure, and its cross section is H-shaped. The lower groove structure is used to cover the bottle mouth of the bottle body, and the upper groove structure is used to cooperate with the upper cover. The first air vent is opened on the connecting surface, and the second air vent is opened on the upper groove structure.

[0011] Furthermore, a reinforcing rib is provided in the upper groove structure. The reinforcing rib extends outward from the side of the positioning groove and has a gap with the side of the upper groove structure.

[0012] Furthermore, a side of the reinforcing rib close to the positioning groove is provided with a chamfer inclined toward a side away from the positioning groove.

[0013] Furthermore, the bottom surface of the lower groove structure is provided with a first protrusion for accommodating the bottle mouth of the bottle body, the first protrusion is adjacent to the culture body in the bottle body, and a fourth air hole is opened on the bottom surface of the first protrusion adjacent to the culture body.

[0014] Furthermore, the first protrusion is accommodated in the bottle mouth of the bottle body, and the side of the first protrusion abuts against the inside of the bottle mouth of the bottle body.

[0015] Furthermore, the bottom surface of the upper cover is provided with a downwardly extending locking plate, the outer side of the locking plate is provided with a first hook, the inner side of the upper groove structure is provided with a first clamping platform that cooperates with the first hook, the upper cover is buckled and covered on the upper groove structure, the reinforcing rib is in contact with the bottom surface of the upper cover, the clamping ring is pressed tightly on the air filter element, the upper edge of the upper groove structure is in contact with the bottom surface of the upper cover, the first hook is engaged with the first clamping platform, and the upper cover is fixed to the lower cover.

[0016] Furthermore, the inner side wall of the lower groove structure is provided with a second hook, and the outer side of the bottle mouth of the bottle body is provided with a second clamping platform that cooperates with the second hook. The lower groove structure is buckled on the bottle mouth of the bottle body, the second hook is locked with the second clamping platform, and the lower cover is fixed to the bottle body.

[0017] A stackable edible fungus culture bottle comprises a bottle cap and a bottle body, wherein the bottle cap is the bottle cap of any of the above technical solutions.

[0018] Furthermore, the waist of the bottle body is in an arc-shaped inward concave shape, both ends of the waist of the bottle body are in an outwardly protruding cylindrical shape, and the inner wall of the bottle mouth of the bottle body is parallel to the inward concave apex of the waist of the bottle body.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The utility model adopts the method of opening a second air vent on the side of the lower cover, so that the upper cover with a flat top surface can be used to seal the top. Compared with the prior art in which the first protrusion is set on the upper cover, the utility model realizes that the edible fungus culture bottles can be stacked in the culture bin, and the stacking method can make full use of the storage space and improve the space utilization rate. At the same time, the opening height of the second air vent is parallel to the upper opening surface of the first air vent, and the side opening can allow air to enter the bottle at different angles, forming a more complex and diverse airflow path, which is conducive to the full exchange of air in the entire bottle space. At the same time, the air is opened at a height parallel to the first air vent. The air in the bottle flows horizontally into the bottle cap at a high height. In the process of air flowing from the second air vent to the first air vent, the bacteria and dust in the air will settle to the path range from the second air vent to the first air vent under the influence of gravity. Compared with the prior art that adopts the upper ventilation method for air exchange, the bacteria and dust in the air are affected by gravity and the settling direction is consistent with the direction of the air flow path, which causes the bacteria and dust to accumulate quickly on the air filter. The process of the utility model effectively reduces the amount of bacteria and dust attached to the air filter, keeps the air filter in an unobstructed state, ensures the efficiency of air exchange, effectively promotes nutrient conversion, and shortens the bacteria cultivation time.

[0021] The upper cover and the lower cover of the utility model are detachably engaged, which makes it easier to replace the air filter element. At the same time, the positioning groove is provided to limit the air filter element and prevent it from sliding on the lower cover. The compression ring used to compress the air filter element in cooperation with the positioning groove can further compress and fix the air filter element, thereby ensuring the sealing of the air filter element and preventing the mycelium from being contaminated by dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of a stackable edible fungus culture bottle cap of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of a stackable edible fungus culture bottle cap of the present invention;

[0025] Figure 3 For the utility model Figure 2 A partially enlarged schematic diagram of the figure;

[0026] Figure 4 This is a schematic diagram of the internal structure of the lower cover of the utility model;

[0027] Figure 5 This is a schematic structural diagram of the first protrusion of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the upper cover of the utility model.

[0029] In the figure: 1 bottle body, 11 second clamping platform, 12 waist, 2 bottle cap, 21 lower cover, 211 upper groove structure, 2111 first clamping platform, 212 lower groove structure, 2121 second hook, 213 first air vent, 214 second air vent, 215 positioning groove, 216 reinforcing rib, 217 chamfer, 218 first protrusion, 219 fourth air vent, 22 upper cover, 221 clamping ring, 222 third air vent, 223 clamping plate, 2231 first hook, 23 air filter. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0031] The following specific embodiments are used to describe the technical solution of the present invention in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0032] like Figures 1 to 6 As shown, the utility model provides a stackable bottle cap for edible fungus culture bottles, which is used to cover the bottle mouth of the bottle body 1 of the edible fungus culture bottle. The bottle cap 2 includes a lower cover 21, an upper cover 22 and an air filter 23;

[0033] The lower cover 21 has first air holes 213 connecting the top and bottom surfaces of the lower cover 21. The distance between the first air holes 213 is one-third of the diameter of the lower cover 21. The first air holes 213 have an upper opening surface and a lower opening surface that are opposite to each other. A plurality of second air holes 214 are formed in a row around the side surface of the lower cover 21. The second air holes 214 are parallel to the upper opening surface of the lower cover 21. The upper opening surface of the lower cover 21 also has a positioning groove 215. The diameter of the positioning groove 215 is larger than that of the first air holes 213.

[0034] The air filter 23 is made of synthetic fiber filter cotton, non-woven filter cotton, or filter cotton commonly used to block dust particles and has air permeability. The air filter 23 is placed in the positioning groove 215 and covers the first air hole 213 to filter the exchanged air.

[0035] The upper surface of the upper cover 22 is a planar structure, and the bottom surface of the lower cover 21 faces the lower cover 21 and is placed on the lower cover 21. A clamping ring 221 is provided in the upper cover 22 for cooperating with the positioning groove 215 to compress the air filter 23. The clamping ring 221 is a cylindrical tube, and an array of oblong hole-shaped third air holes 222 are distributed on the side of the clamping ring 221. When the upper cover 22 is covered on the lower cover 21, the clamping ring 221 is aligned with the positioning groove 215 and is located in the positioning groove 215, pressing the outer peripheral edge of the air filter 23 placed in the positioning groove 215. After the positioning groove 215 presses the air filter 23, the third air hole 222 is flush with the upper opening surface of the first air hole 213, ensuring that the air flowing in from the second air hole 214 can flow smoothly into the first air hole 213.

[0036] The lower cover 21 is a combination of an upper groove structure 211 and a lower groove structure 212, and its cross section is "H"-shaped. The lower cover 21 with an "H"-shaped structure is convenient for connecting the bottle mouth of the bottle body 1 and the upper cover 22. After connecting with the bottle mouth of the bottle body 1 and the upper cover 22, the top of the upper groove structure 211 will extend into the upper cover 22 and abut against the bottom surface of the upper cover 22. The lower groove structure 212 can extend to the bottom of the bottle mouth to cover the bottle mouth, which can effectively prevent water vapor from flowing into the bottle cap 2 and the bottle body 1.

[0037] A reinforcing rib 216 is provided in the upper groove structure 211 of the lower cover 21 to increase the deformation stress of the lower cover 21 and effectively prevent the lower cover 21 from deforming. There is a gap between the reinforcing rib 216 and the side of the upper groove structure 211, which prevents the reinforcing rib 216 from blocking the second air vent 214 and ensures smooth air flow.

[0038] On the side of the reinforcing rib 216 close to the positioning groove 215, a chamfer 217 is set that is inclined toward the side away from the positioning groove 215. When replacing the air filter 23, the outward-opening chamfer 217 makes the operating space in the positioning groove 215 larger, making it easier to replace the air filter 23. At the same time, when inserting the air filter 23, the inclined chamfer 217 can guide the air filter 23, and the air filter 23 can slide into the positioning groove 215 more easily through the inclined chamfer 217.

[0039] The bottom surface of the lower groove structure 212 is provided with a first protrusion 218 for being accommodated in the bottle mouth of the bottle body 1. The first protrusion 218 is a bowl-shaped structure. The opening surface of the bowl-shaped structure is connected to the inner top surface of the lower groove structure 212. The outer diameter of the first protrusion 218 is close to and roughly equivalent to the bottle mouth of the bottle body 1. A fourth air hole 219 is opened in the center of the first protrusion 218. The opening size of the fourth air hole 219 is the same as that of the first air hole 213. When the lower cover 21 is closed on the bottle mouth of the bottle body 1, the first protrusion 218 will be close to the culture medium in the bottle body 1, which can effectively inhibit the growth of aerial hyphae, reduce aging fungus blocks, and eliminate the scratching process. The fourth air hole 219 ensures that air can smoothly enter the bottle body 1.

[0040] The bottom surface of the upper cover 22 is provided with a downwardly extending locking plate 223, the outer side of the locking plate 223 is provided with a first hook 2231, the inner side of the upper groove structure 211 is provided with a first clamping platform 2111 that cooperates with the first clamping hook 2231, the upper cover 22 is buckled and covered on the upper groove structure 211, the reinforcing rib 216 is in contact with the bottom surface of the upper cover 22, the clamping ring 221 is pressed tightly on the air filter 23, the upper edge of the upper groove structure 211 is in contact with the bottom surface of the upper cover 22, the first hook 2231 is engaged with the first clamping platform 2111, and the upper cover 22 is fixed to the lower cover 21.

[0041] The inner wall of the lower groove structure 212 is provided with a second hook 2121, and the outer side of the bottle mouth of the bottle body 1 is provided with a second clamping platform 11 that cooperates with the second hook 2121. The lower groove structure 212 is buckled on the bottle mouth of the bottle body 1, and the second hook 2121 is locked with the second clamping platform 11, and the lower cover 21 is fixed to the bottle body 1.

[0042] The connection between the lower cover 21 and the bottle body 1 and the upper cover 22 adopts a snap-fit structure. This snap-fit structure not only meets the sealing performance of the bottle cover 2 but also cooperates with the automatic opening and closing of the cover in the edible fungus production process, and is integrated into the automated production process.

[0043] A stackable edible fungus culture bottle comprises a bottle cap 2 and a bottle body 1. An edible fungus culture medium is placed in the bottle body 1. The bottle cap 2 according to the above technology is covered in the bottle body 1. The bottle cap 2 can prevent external impurities, dust, microorganisms, etc. from entering the bottle and contaminating the edible fungus culture medium, thereby ensuring a clean and hygienic growth environment for the edible fungi. The air vent design of the bottle cap 2 can control the gas exchange between the bottle and the outside world, ensuring that the edible fungi obtain an appropriate amount of oxygen during the growth process and discharge metabolic products such as carbon dioxide. Furthermore, the bottle cap 2 can reduce the evaporation of water in the bottle to a certain extent, maintain the humidity of the culture medium, and provide suitable moisture conditions for the growth of the edible fungi.

[0044] The waist 12 of the bottle body 1 of the edible fungus culture bottle is an arc-shaped concave shape, and the two ends of the waist 12 of the bottle body 1 are cylindrical shapes that protrude outward, so that the bottle body 1 appears to have a concave waist 12 and protruding ends. When the edible fungus culture bottles are stored side by side, the two contacting bottle bodies 1 directly use the protruding ends as fulcrums, reducing the direct contact area between the two adjacent bottle bodies 1 and reducing interference. At the same time, using the two ends as fulcrums can ensure the stability of the bottle body 1. Further, this design is conducive to air circulation around the culture bottle. Edible fungi require a certain amount of oxygen supply during growth, and good air circulation can ensure sufficient oxygen content in the bottle. The gaps between the bottle bodies 1 allow air to flow more freely, providing better conditions for the respiration of edible fungi.

[0045] The inner wall of the bottle mouth of the bottle body 1 is parallel to the concave apex of the waist 12 of the bottle body 1, that is, the bottle mouth of the bottle body 1 will not be excessively retracted inward. The bottle mouth of the utility model is enlarged relative to the bottle mouth of the existing edible fungus culture bottle. The enlarged bottle mouth can increase the mushroom yield rate of edible fungi. At the same time, the enlarged bottle mouth is beneficial to the conversion of oxygen, promotes the growth and development of edible fungi, and further improves the mushroom yield rate.

[0046] Experimental comparison;

[0047] Comparison of different bottles in the cultivation process of velvet antler mushrooms. The stackable edible fungus culture bottle of the utility model is marked as PZ-2, and the traditional culture bottle is marked as PZ-1. The experimental data are shown in Table 1 below;

[0048]

[0049] Table 1

[0050] Note: “++” means more, “+++” means more;

[0051] Results showed that PZ-2 exhibited significantly different mycelial growth rates and primordium formation time compared to PZ-1, with all indicators superior to PZ-1 (Table 1). P1 exhibited slower mycelial growth and slightly lower mycelial density than PZ-2. After mycelial completion and maturation, there were no significant differences in the appearance of PZ-1 and PZ-2.

[0052] The difference between the stackable edible fungus culture bottle of the utility model and the existing culture bottle in the mushroom fruiting stage;

[0053] During the young mushroom stage, PZ-2 grew slightly faster than PZ-1, with better overall uniformity. The cap was dark gray, the stipe was light gray, and the color became lighter below the middle of the stipe. Over 90% of the mushrooms grew vertically, while PZ-1 showed average overall uniformity, with fewer gaps and a stocky appearance. Research has shown that opening holes in the side of the lower cap and using large-diameter cultivation bottles improves air circulation and is more beneficial to mushroom growth.

[0054] The fruiting bodies of PZ-2 grow faster than those of PZ-1, with better overall uniformity. The stipe begins to curve outward and grow more sparsely, with the outer crown width increasing, becoming elongated. Over 95% of the cap diameters exceed the diameter of the stipe at its thickest point. In contrast, PZ-1 exhibits average overall uniformity, with fewer voids and an elongated fruiting body. Research has shown that opening holes in the lower cap and using large-diameter cultivation bottles improves air circulation and promotes better growth.

[0055] During the maturity stage, the fruiting bodies of PZ-2 exhibited superior agronomic traits to those of PZ-1, with better overall uniformity. Observed from above, the stems were less exposed, grayish-yellow in color, and elongated, with 90% of the stems exceeding 13.5 cm in length. In contrast, PZ-1 exhibited average overall uniformity. Observed from above, the stems were less exposed, grayish-yellow in color, and elongated, with 90% of the stems exceeding 12 cm in length. Research indicates that the superior stipe length and cap thickness of PZ-1 indicate that Pilose Antler Mushroom fruiting bodies are more suited to growth when cultivated in large-diameter culture bottles.

[0056] The above content is part of the specific implementation methods of the present utility model and does not limit the scope of protection of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. A stackable edible fungus culture bottle cap, used to cover the bottle mouth of the edible fungus culture bottle, characterized in that: The bottle cap comprises a lower cover, an upper cover and an air filter; The lower cover has a first air vent communicating with the top and bottom surfaces of the lower cover. The first air vent has an upper opening surface and a lower opening surface facing each other on the lower cover. A plurality of second air vents are formed in a row around the side surface of the lower cover. The second air vents are parallel to the upper opening surface of the lower cover. The upper opening surface of the lower cover also has a positioning groove, the diameter of which is larger than that of the first air vent. The air filter is arranged in the positioning groove and covers the first air hole, and is used for filtering the exchanged air; The upper surface of the upper cover is a planar structure, and the bottom surface of the lower cover is covered on the lower cover downwardly. A clamping ring is provided in the upper cover to cooperate with the positioning groove for clamping the air filter element, and a third air vent is provided on the side of the clamping ring.

2. The stackable edible fungus culture bottle cap according to claim 1, characterized in that: The lower cover is a combination of an upper groove structure and a lower groove structure, and its cross section is "H"-shaped. The lower groove structure is used to cover the bottle mouth of the bottle body, and the upper groove structure is used to cooperate with the upper cover. The first air vent is opened on the connecting surface where the upper groove structure and the lower groove structure are connected, and the second air vent is opened on the upper groove structure.

3. The stackable edible fungus culture bottle cap according to claim 2, characterized in that: A reinforcing rib is further provided in the upper groove structure. The reinforcing rib extends outward from the side of the positioning groove and has a gap with the side of the upper groove structure.

4. The stackable edible fungus culture bottle cap according to claim 3, characterized in that: A side of the reinforcing rib close to the positioning groove is provided with a chamfer inclined toward a side away from the positioning groove.

5. The stackable edible fungus culture bottle cap according to claim 2, characterized in that: The bottom surface of the lower groove structure is provided with a first protrusion for accommodating in the bottle mouth of the bottle body, the first protrusion is adjacent to the culture body in the bottle body, and a fourth air hole is opened on the bottom surface of the first protrusion adjacent to the culture body.

6. The stackable edible fungus culture bottle cap according to claim 5, characterized in that: The first protrusion is accommodated in the bottle mouth of the bottle body, and the side of the first protrusion abuts against the inside of the bottle mouth of the bottle body.

7. The stackable edible fungus culture bottle cap according to claim 3, characterized in that: The bottom surface of the upper cover is provided with a downwardly extending locking plate, the outer side of the locking plate is provided with a first hook, the inner side of the upper groove structure is provided with a first clamping platform that cooperates with the first hook, the upper cover is buckled and covered on the upper groove structure, the reinforcing rib is in contact with the bottom surface of the upper cover, the clamping ring is pressed tightly on the air filter element, the upper edge of the upper groove structure is in contact with the bottom surface of the upper cover, the first hook is engaged with the first clamping platform, and the upper cover is fixed to the lower cover.

8. The stackable edible fungus culture bottle cap according to claim 2, characterized in that: The inner side wall of the lower groove structure is provided with a second hook, and the outer side of the bottle mouth of the bottle body is provided with a second clamping platform that cooperates with the second hook. The lower groove structure is buckled on the bottle mouth of the bottle body, the second hook is locked with the second clamping platform, and the lower cover is fixed to the bottle body.

9. A stackable edible fungus culture bottle, characterized in that: The bottle cap comprises a bottle cap and a bottle body, wherein the bottle cap is the bottle cap according to any one of claims 1 to 8.

10. The stackable edible fungus culture bottle according to claim 9, characterized in that: The waist of the bottle body is in an arc-shaped inward concave shape, both ends of the waist of the bottle body are in an outwardly convex cylindrical shape, and the inner wall of the bottle mouth of the bottle body is parallel to the inward concave vertex of the waist of the bottle body.

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