If you use aluminum foil for baking or cooking, the good news is that it is easily recyclable. Foil is made of 100 percent pure aluminum, and it's the same material used to make soda cans. The trick to recycling aluminum foil is to make sure it's clean and not covered in food. Ball it up, and keep adding used aluminum foil to the ball. Smaller pieces can get sorted incorrectly at the recycling facility and could end up with paper products instead. Make sure the aluminum foil ball is at least 2 inches in diameter to avoid this.