Now this is such a good idea. And I am honestly really surprised that this hasn't been created sooner. The amazing part of this is that 3 High School students created the Smart Straw.
Three young woman created the straw to detect roofies, GHB, and ketamine. Those three are the most commonly used as a rape drug. All you have to do is put the straw into a beverage and if it stays clear, it is safe to drink.