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Red Solo plastic cups have become synonymous with underage drinking and binge drinking in the United States. Although ostensibly first used as a more discreet alternative to simply drinking beer straight from the can or bottle or in a transparent cup, today a red Solo cup, especially in a collegiate setting, is considered more likely to contain an alcoholic beverage than not. Solo cups have become the cup of choice for Beer Pong and Flip Cup on college campuses.