... When I saw this in the Avon catalogue I decided to give it a try.
The packaging states this "luxurious gel works as a liquid bra, to help firm and tone the skin around your bustline for irresistible curves". Directions are to apply this every morning to the bust in an upward motion and wait ... Read review
I don't think there's a limit to how many bottles should be used, but for best results a continued use would be better, I think it is the type of product that once you start to use you shouldn't stop. I don't think you should expect any negative effects if you were to stop using it, your boobs would just return to their natural state eventually.