Nobody likes nasty spit water bottles. Based on customer feedback, we took our original Snuff Cup design, and made it way better. Note: Any orders for other Snuff Cups where "pro" is not specified will be for our old, original version! Features of the Snuff Cup Pro: ✓ An improved version of our 3.0 flip-top lids Each Snuff Cup pro comes with a flip-top style lid similar to the lids used on the original, but now with an air valve system to make sure the lid stays shut. We also added two small notches on the sides of the lid, so that you don't have to put your hand inside the lid to remove it!