Ace Teah via Amazon offers the Ace Teah TPU Waterproof Phone Case 2-Pack in Black/White for $8.99. Coupon code "WEE2IZEI" cuts it to $6.99. Plus, Prime members bag free shipping on all orders. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.22.) That's tied with our mention from last month, $15 off, and the lowest total price we could find. It features a close-knit swivel/curved snap lock and is compatible with most smartphones up to 6".