If you're hanging outside and don't want to rely on inefficient coolers to keep your drinks cold, you can make this surprisingly effective refrigerator out of a few flower pots.
For this project you'll need two terracotta pots, one larger than the other. You'll also need something to plug up the holes in the bottom, as well as some sand, water, and a cloth or towel. Basically, you need to put one pot inside the other, and fill up the spaces with wet sand, which keeps the inside of the pots cold. You'l also need to put a wet towel over the top to keep the warm air and light from getting in. It's incredibly cheap, very effective, and doesn't require any electricity. Check out the video above for more info.
Flower Pot Fridge! [Household Hacker]