Drop one in a clear drink and instantly it turns into the worm from a Tequila bottle. Distract the victim and drop it in their drink. Then you can stare at their drink and ask "what's that?".

For tips on the proper way to use practical joke products, subscribe to The Practical Joker Weekly Newsletter at the bottom left of this page. It's free and you can win a bag of tricks by sending in your practical joke.