Introducing the Turtle - probably the greatest cache container in the world.  Manufactured from sturdy black polypropylene, there's no need to camo, and the unique double helix twist-lock ensures a positive seal every time.
The ideal size for a large cache series, with numerous benefits over the traditional lock-n-lock.  Frost-proof, shatter-proof and UV-proof, this material is so resistant, it's even hydrochloric acid-proof.

A generous 300ml capacity comfortably holds a small log book and pencil, with room for small trades.  These industrial grade containers are substantially made, and much more rigid than you might expect.