Leak proof and easy to remove.

This product works great - no leaks even when the bottle is lying on its side

If you do the bottom of stopper will not touch the sides of the bottle and the there will be a very slow leak from the stopper when the bottle is on its side.

Easy to use, no leaking.

Works very well no leaks yet

This product works great - no leaks even when the bottle is lying on its side

Had to figure out how they worked as they did not come with instructions.