The JuiceTank is the first iPhone case to feature an integrated wall charger into this iPhone case. So you can just plug your iPhone 4 or iPhone 4S directly into a wall outlet to charge your device. Cool idea. Desgned by Lloyd Gladstone and Jesse Pliner. The JuiceTank's creators are currently trying to raise $125,000 through Kickstarter to put it into production, and if you are one of the first 400 people to back them you can reserve one for just $40. But if you decide to wait until they're available for sale, you can expect to shell out at least $70 instead.