Ohhhhhhh my ... LOL!!! I have never even used a bottle seal with my XL!!! NOW I know what that little thing IS that comes in the package with the extra bottles!! Haha! Geeesh! I feel like a big dumbie!! So you put the seal on top of the bottle & screw it in ... Then the plastic seal stays up there??? Mine's been doing fine without the bottle seal (except for a few random leaks ... Maybe this is why!!). Does anybody else not use the bottle seal plastic thingie? WHAT exactly does it do anyway?
Let me guess.... it seals the bottle and prevent from leaking?? LOL!!!