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Drink Smart Drink Safe sells a test coaster that contains two test strips.

Testandgo and Drink Smart Drink Safe are among several companies that sell tests that detect gamma-Hydroxybutyric acid and ketamine.

Still, these are subtle effects, and there is no evidence that any prescription drug or supplement or smart drink is going to raise your I.Q.

The beer first got its start with Jessica Simpson, who touted it in ads urging beer guzzlers to "Be Smart, Drink Smart."

Snapple is using it in a new "smart drink" line called Elements, but the real thing is also "going to be tremendous," says Meyer.