The clips (on the front) that are supposed to hold it altogether are poorly designed. If you stack like shown they fall out.

The fizz-keeper keeps an open beer or soda carbonated for hours. Takes like 7-9 pumps to really secure the carbonation. The amount of fizz that can be kept in the can is amazing.

It is supposed to latch to the outside of the base ring and snap twice. In fact it rubs so close to the rubber gasket that the gasket latches it better but it wont stay in place. I'm finished with these influencers.