Butter Cap

Butter and bacon. Unfortunately, this design only works with one of them.

Butter readily absorbs odors from your fridge and also can oxidize, making it taste.... off. The definition of "off" depends on what you have in your fridge, but I can vouch that fishy butter is gross. The waxy paper it is stored in normally prevents this process, but after you peel the wrapping off, you can never really fully seal it again. This cap seals the end of the stick makes sure that the wrapping won't accidentally open and expose the buttery goodness to that rotten onion in the back of your crisper drawer.

Currently this only works for sticks butter that are 1.25"x1.25". For "western" sticks that are 1.5", scale by 120%.