I use a plethora of storage canisters depending on the quantity of bullets including large mouth glass jars, plastic peanut butter "jars", tuppperware, coffee cans, cake tins, coffee tins, and sometimes even the original containers. To me, it is a matter of convenience. If they won't stack on the shelf, say too much combined weight, I put them on the floor in steel ammo cans and mark the outsides trying to keep a single caliber per can.