Groupon offers the OtterBox Armor Series Case for iPhone 4/4s in Artic, Neon (pictured), Neon AT&T, iPhone 5 in eight colors, or Samsung Galaxy S3 in four colors for $24.99 with free shipping. That's $5 under our expired mention from yesterday and tied as the best price we've seen for these cases. (They're a current price low by at least $21.) These waterproof cases are purported to withstand a 10-foot drop, two tons of crushing force, and up to six feet of water for 30 minutes. Deal ends March 9.