Walmart, Best Buy, Dick's Sporting Goods and Amazon.com all sell waterproof cases for cellphones. Some of the waterproof containers are designed as a sealable bag while others are form-fitting styles that more closely resemble conventional phone covers.
Amazon.com has a wide selection of waterproof cellphone cases from multiple manufacturers and designs that fit many different cellphone models. It offers a wide variety of Lifeproof brand cases to fit most iPhone models. Amazon.com also handles TETHYS, SafeWays and LevinTM brands with universal covers available. The company carries the Otterbox Armor Series as well which is its top-selling brand of protective cellphone cases, as of 2015.
Best Buy has Otterbox cases available to fit most of the different cellphone, MP3 player and tablet brands. It features the Otterbox Preserver series as a waterproof option that also offers drop, scratch, crush and dust protection.
Walmart and Dick's Sporting Goods sell the bag style waterproof cases in the Dry Pak and DryCASE brands respectively. The Dry Pak cases are padded and lined cases with an adjustable neck lanyard. The DryCASE models are vacuum sealed, clear enough to use the camera through the case and waterproof tested to depths of 100 feet for one hour. It is also equipped with a small pump to vacuum pressurize the case as well as an armband and lanyard carrying options.