I was told that there was a product or some type of pill that you can put in your pool, and what it does is when you have people / friends over and when they pee-pee the water surrounding them would turn a different color; like purple. Is there such a product??

If so , I want to buy it!!

In about 3 weeks I plan to throw a pool party and I want to toss that in the pool , so when they try to pee, they will have a sweet surpise that will go around them. hahaha