The BearVault is the result of experienced backpackers and their pursuit of a better bear canister. The BearVault has an innovative patent pending design so you can open and close the lid without tools. Super rugged transparent polycarbonate housing resists impacts without shattering. Extra wide, rain proof opening provides full access for loading, unloading, and finding items. Built in guides keep tie down straps in place so extra carrying case is not needed to attach to backpack.NOTE: Use a coin i.e. Quarter to press in the locking bumps on the lid, unscrew the lid while the bump is held in as it passes the housing lock and you're in! The BearVault is meant to keep bears out, not humans.