I used to use a selection of particles etc from dynamite baits, mainly I used to buy the big sweetie jar type containers. I stopped doing this and switched to the smaller tins after a shorter session which resulted in left over bait. Rather than throw it away, I read every inch of the containers and searched the internet trying to find out how long it could be stored for once opened. Freezing of course is one option, but does anyone actually know how long baits such as hempseed will keep unfrozen once the tin is opened? Possibly stored in an air tight container.