ICEE BATH BOMBS are now a thing that exists. You drop one of the balls into your bath and it makes the water look and smell like one of the three signature ICEE flavors: Cherry, blue raspberry, and lemonade.
But they don't make the water TASTE like an ICEE. In fact, the packages have a warning that you shouldn't drink the water.
Anyway, if you're interested, you can get a bag of three bath bombs for $8 on Amazon. Unfortunately they were sold out when we last checked.