It's had its place in the kitchen almost as long as salt and pepper. Aluminum foil—thin, silver, rolled into a convenient roll—has been with us for baking, freezing, covering leftovers, and even creating makeshift antennas. But beware: did you know that you may have been using it ALL your life? Yes, you read that right. That perpetually overlooked distinction between the glossy and matte sides isn't just an aesthetic whim of manufacturers.