Do I need individual packs, a cube or a brick?

Individual packs are wrapped in clear plastic to give them a two year shelf life.  A cube is just 12 individually wrapped Boveda.  A brick is a little different, it’s 20 unwrapped Boveda.  As long as you re-close the master bag after removing the next round of Boveda for your humidor, they’ll have a two year shelf life inside the bag. Buying by the brick gives you the best Boveda pricing available.