LOL at the last post; "No, officer, really, it's protein powder; wanna taste?"
I give my old ones to my dad who is a veritable handyman / carpenter and they are great for nuts & bolts, screws, etc. as long as you scrub the label off or write over them.
I give the others to my buddy who always goes camping and since they have screw down caps he loves to store food in them & supplies for rafting and camping...
The uses are endless, sort of like Tupperware