Yepper. Just about anything.
Except - A cap of WD-40. My son put a can of WD-40 in one. He had to remove the cap so it would fit standing up. Many months later, when he opened the ammo can, WHAT A SURPRISE!! The ammo can lid had depressed the plunger and the entire container was pressurized. It came open with authority. Glad that he wasn't hurt. That's one way to test the seal.