This product is designed to extinguish cigarette butts, remove fire hazards, absorb soot, suppress second-hand smoke, reduce smoke odor, and keep the air fresh. It is suitable for various smoking places such as home, office, reception room, hotel, bar, KTV, etc. To use, pour the product into the ashtray, add 60-90 ml of water, and wait for the sand to expand. Keep the gadget away from children and avoid prolonged contact with the air to avoid water loss.