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"Straw Guard" is a future straw which can warn users excessive amounts harmful of microorganisms. Using antibody-antigen reaction, the antibody test strip is coated on the exterior of the straw. Once the straw begins to react, the test region turns rend to remind users the beverage is no longer drinkable.
Tzi-Wei Ou Maggie Sheu Mien-Chih Chen Chen-Hsun Huang