Integrated LFA Cup Structure for Partial-Wetting Caffeine Detection
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Solution Overview
Problem
Consumers lack a convenient and practical method to determine the caffeine content in their beverages, such as coffee, as existing methods require separate devices or tests that are cumbersome and impractical for everyday use.
Innovation Solution
A cup with an integrated lateral flow assay (LFA) chamber that allows partial wetting of the assay when filled with liquid, featuring a transparent window for visual observation of test results, ensuring the assay functions effectively and provides real-time detection of caffeine presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate device or test is used to detect caffeine content, then detection capability is provided, but convenience and ease of operation deteriorate due to cumbersome procedures
Solution Approach 1:
The patent combines the LFA testing mechanism directly into the cup structure, merging the beverage container and detection device into a single integrated unit. The LFA chamber is positioned within the cup body, allowing caffeine detection to occur directly in the beverage without requiring separate testing equipment or procedures.
Solution Approach 2:
The cup serves multiple functions: it acts as both a beverage container and a detection device. The integrated LFA chamber enables the cup to simultaneously hold the beverage and perform caffeine content analysis, eliminating the need for separate specialized testing equipment.
2Reliability
If the LFA is fully immersed in liquid, then sufficient liquid contact is achieved for detection, but the assay integrity deteriorates due to excessive wetting
Solution Approach 1:
The LFA chamber is designed with selective permeability characteristics, allowing liquid to contact only specific regions of the LFA strip through controlled openings. This local quality approach ensures that only the necessary portions of the assay are exposed to the beverage, maintaining detection accuracy while preventing damage from excessive wetting.
Solution Approach 2:
The chamber design intentionally limits liquid exposure to a partial amount - just enough to wet the LFA strip for detection purposes. The controlled openings restrict liquid flow to achieve the minimum necessary contact for reliable detection without the harmful effects of full immersion.
3Ease of operation
If the LFA is integrated within the cup, then convenience is improved, but device complexity increases due to additional chamber structure
Solution Approach 1:
The cup is segmented into functional zones: the main beverage-holding chamber and the integrated LFA testing chamber with controlled openings. This segmentation allows the detection function to be integrated into the cup structure while maintaining distinct functional areas, managing complexity through organized spatial division.
4Difficulty of detecting and measuring
If a transparent window is added for observation, then visual detection capability is improved, but manufacturing complexity increases
Solution Approach 1:
The LFA strip utilizes color change indicators to display caffeine detection results visually. The transparent window is positioned to allow observation of these color changes, providing clear visual feedback to the user. This approach simplifies the detection mechanism by relying on optical color indicators rather than complex electronic sensors.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables consumers to conveniently and accurately determine caffeine content in beverages by integrating an LFA within a cup, allowing real-time visual observation without disrupting the drinking experience.
Implementation Method 1
a lateral flow assay (LFA) integrated within a chamber located at a selected position within the cup
Data Source
AI summary
The present disclosure discusses a novel cup designed with an integrated lateral flow assay (LFA) to detect the presence of caffeine in coffee. The LFA is housed in a specialized chamber in a selected position or at the bottom of the cup. This chamber is designed with an opening only at the bottom, which traps air when the cup is filled with liquid, ensuring that only the bottom part of the LFA is wetted by the beverage. This design allows the LFA to function effectively, provided the coffee does not contain milk or other additives that could interfere with the test. The invention includes a transparent window on the cup to allow the user to observe the LFA and determine the caffeine content visually. Additionally, the cup can be modified or retrofitted with LFA chambers that can be attached to existing cups or stand inside them like a straw.