I long term cellar in original tins, mylar and jars with aluminum foil tape over the lid, but have used the swing top for open blends (Smaller and 2-3 oz. at a time) and have found that if you put the paper that came in the tin inside over the tobacco and throw in a mini 55% Boveda humidity pack on top, it will keep optimally for 1 year or more, even if the seal has a small leak.