Watch your bath water bubble, fizz, and change colors as these drops dissolve. We make our drops with an ultra concentrated formula, so you only need to use 1-2 drops to brighten up bath time! Each tin contains 18 blue drops, and 18 green drops. These bath drops are the perfect to give as a gift or to use on the daily to make bath time fun and colorful! Tablets will not stain the bathtub. Any residue can be easily removed with tile cleaner or warm soap and water.