Yeah, I don’t really like C&D’s packaging. I just bought a cardboard ‘tin’ of their Steamworks and I’m thinking I may just thrown that in a jar.Ahhh. I don't have enough experience to know how long they should ultimately last but I would imagine it would be many months at least. I have a couple that have been opened for a couple months without issue. I did have a tin of Plum Pudding Special Reserve that had a few bowls-full already rubbed out that dried considerably after just a few weeks, but those tins with the plastic lids don't seal well. The metal round tins shouldn't be a problem.