Compound thermal keeping bag

Abstract

A compound thermal keeping bag comprises an upper cover having outer threads and at least one ear for rotating the cover; a silica gel washer enclosing; a sleeve having inner threads; the sleeve can be locked to the upper cover and lock the washer; a center of the sleeve having an opening; a waterproof sealing ring having double face films at two sides of the waterproof sealing ring; the outer double face film serves to be combined with a water and heat proof cloth; the water and heat proof cloth formed as a bag for receiving ice bricks or hot water so as to provide the function of warm keeping; a buckling ring arranged at an outer surface of the water and heat proof cloth; and a heat endurable rubber ring arranged at an outer surface of the buckling ring.

Description

FIELD OF THE INVENTION[0001]The present invention relates to thermal keeping bags, and in particular to a compound thermal keeping bag, where heat can be isolated effectively so that the temperature of the thermal keeping bag can be retained for a long time with fading. Thereby a ring is used so that user can hold the bag without being hurt. Thereby the thermal keeping bag is matched to the requirement of environment protection and is cost-saved.BACKGROUND OF THE INVENTION[0002]Referring to FIG. 1, a prior art thermal keeping bag 100 is illustrated. An elastic metal plate and sodium acetic acid are received in the bag. The elastic metal plate will cause the sodium acetic acid to generate heat. In use, the bag covers upon the body or hand to keep warm with temperature between 40 to 45° C. However in this design, the temperature cannot be retained in a longer time period. Thereby the thermal keeping bag 100 is used only a few times before being deserted. Not only the cost is high and ...

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