Probably a simple question .... I bought a bunch of hops (pellets) and they arrived today. They are 1 oz packages, those hopunion packages, which certainly don't appear to be vaccuum sealed ... so, if I put these in the freezer for a couple months. OK? or do I need to buy or borrow a vaccuum sealer. If I make what I intend to make, I'll have these used by end of March for sure.