The eCool [$349] uses the ancient method of storing food and beverage underground to keep it cool and fresh, but brings that concept right up to date. This is an earth cooler, which uses nothing but the natural lower temperature of the ground to cool your cans of beverages.The eCool is 44 in tall and weighs 26 lbs. Most of the unit stays permanently underground, where it can store up to a case of beer. Installation for the eCool is as easy. Dig a deep hole, lower the cooler into it, and pack soil around its sides. A post hole driller seems like the obvious tool for the job, but a standard shovel will work.