When you're at the beach, going into the water requires an extreme amount of trust that your fellow man won't steal your shit. You wouldn't leave your purse or your wallet out on the counter of the bar while you go to the bathroom, but at the beach, you leave everything in plain view and hope for the best.
This, of course, doesn't square with your life motto, which is, essentially, TRUST NO ONE. Let us introduce you to the Beach Vault ($39), which hides your valuables literally in the sand so beach combers looking to make a quick score with unattended wallets and cell phones won't get at your shit. How does it work? The Beach Vault is essentially a big hollow screw that you insert into the sand and then fill with your valuables. Once in the sand, the Beach Vault is fully out of sight (it even comes with a towel that covers it), so you can stay in the water as long as you want without worrying about your stuff getting snatched.