BuyDig offers the OtterBox Armor Series Case for Apple iPhone 5 in Arctic, model no. 77-25798, for $18.99 with free shipping. That's $6 under our mention from last winter and the lowest total price we've seen for this case. (It's also a current low by $6.) This case features a built-in screen protector, is purportedly crush-proof up to two tons, can be submerged in up to 6.6 feet of water for up to 30 minutes, and can protect your phone from drops of up to 10 feet.