These Natural gel products absorb and destroy airborne odors as they occur. The scented gels clean and scent the air. Because there is no open flame, there is no soot and they are safe around children. You can leave them open to keep your home fresh and fragrant, even when you are not there. For best results, increase air flow around product by placing near or in air handling system ducts. For strong odors, completely remove lid and place out of reach of children and pets. Odor Absorbers are a safe, clean alternative to scented candles.