SMART  AERO SPACE Aluminum Airtight Cylinder Storage Stash Case. Precision machined from aerospace grade anodized aluminum and polished to a flawless mirror finish with airtight seal.A crucial part of the grinding system is making sure the ground herb is kept in a completely airtight container, not much larger than the volume of the ground herb being stored. As anyone knows, ground herb drys very quickly and becomes stale once dry The slim design is about the diameter of a film canister and 3 inch long fits into any pocket or purse. These comes in assorted colors