Dry Ice

Imagine trying to keep your drink cold at a picnic without access to a refrigerator; you might use ice cubes that eventually melt and turn into water. Similarly, dry ice, which is the solid form of carbon dioxide, sublimates, or turns directly from a solid into a gas, without becoming a liquid first. Just as ice cubes cool your drink through melting, dry ice cools its surroundings by sublimating, but instead of leaving a puddle, it disappears into the air, like a magician's disappearing act.