Anything you buy that comes in a bag can be moved into a jar. It saves a lot of space because jars tesselate nicer and can use up vertical space more efficiently. It also encourages you to actually use the things you buy because you’ve now removed the friction of digging through piles of bags and hoping that the bag you pull out isn’t load bearing for the rest of the pile. Opening a jar is also much easier than opening/resealing bags.

We never have enough jars in this household.