This is one of the best items I have ever purchased, in fact I own several. They are so practical. You can use them on wine bottles, which I do every night. You can then put your bottle in the door of the fridge (it will now fit!) or lay it down (it will not leak!). You can use it on any bottle that it will fit. I use it on soda bottles to maintain the fizz without any leakage. What makes it fun is all of the funny saying printed on the top. Buy several, you will need them!