Not battery operated: No need for batteries or mains electricity. Easy to use: Perfect for parties, barbecues or festivals! Great for picnics: Simply dig a 10cm whole with an approximate depth of 95cm and fill in the earth once it's in the ground. Beer cooling jacket: Keep your beers at the optimum drinking temperature using the cooling effect of your back garden! Keep beer cool: Get an underground beer cooling tube. Holds your can: Holds up to eight 330ml cans. Cancool Underground Beer Cooling Tube | Living Social