I found these fizzed better the warmer the water was. I personally broke my bombs in half and sometimes quarters as they are that big. I got roughly 16 bomb out of this set. These do contain glitters, but did not make the water or myself glittery. I found they did not dry out my skin and made my skin feel more hydrated. I did notice a little color change in the tub as these have color to them, but found that they did not stain my tub. However, they did leave a greasy feeling to the tub because of the oils in the bomb. This greasy feeling did go away after I rinsed out the tub.
I received these bath bombs for free for my opinion. Everything I have written are my own statements based on my own honest opinion.