Cambond via Amazon offers its Cambond Clear Universal Waterproof Cellphone Case 2-Pack in Black for $9.99. Coupon code "LKE2PBQN" drops it to $6.99. Plus, Prime members bag free shipping. That's tied with our mention from last week for similar cases, $13 off list, and the lowest price we could find. These IPX8-certified cases are waterproof up to 98 feet. Deal ends May 20.