I do enjoy the Bosweel aromatic tobaccos, have purchased a few tins from a friend here in Brazil, that brought them from the US recently. My concern is that the Boswell tins do not seem to be very safe for long term storage (let´s use 1-2 years for the sake of discussion). Should I transfer the tobacco to mason jars? Or would the tins keep it ok for a while (without opening them, of course)?