I use 5 gal buckets from wally world. Put 8 inches under ground With a flannel shirt as the last thing in. Firearm should be in SEALED plastic bag with plenty of Auto trans fluid for lub. Ammo below that and other commoditys below that. Use panty hose cut off and tied in knot full of white rice for drier. Put one underground in 1999 and checked it in 2003. NO PROBLEMS FOUND. Renewed food and water and replanted it!