With it readily available why would you want to store it for several years? (more just a question out of curiosity).
But, the original packaging should be serviceable. Given the composition of how the stuff comes, you don't really have much to worry about. Obviously you will want to leave it in the original state that you received it in. But, if you want to have peace of mind, you can always filter it and store it in vials to ensure that you are g2g.
-Huge