Free Idea # 274 - Drinking straw with a detector strip

Invent a drinking straw with a detector strip down the side
that would indicate whether a drink contains any illegal
substances. Straws would be given out with drinks at bars,
pubs, and clubs to promote customer safety and highlight
the problem of drink spiking. If found positive the straw could
later be used as evidence, as some substances used to spike
drinks leave the body very quickly and can be difficult to
test for.