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For general Tetra Pack drinks, once the straws are inserted, both the straws and drinks are exposed to flies and bacteria. Even if you put them in a freezer, the odors from other food and bacteria in the freezer can easily contaminate the pop-opened drinks and change the tastes. Hence, there should be a way to improve the current way of package.
Take Tetra pack drinks for example, there is usually one straw-inserted hole on it. The new design adds another hole on the package for consumers to insert the top end of the straw into the second hole so as to reduce the risks of bacteria exposure.
China University of Technology