Fly Buster, Home and Outdoor Living non-Toxic Fly Trap, Pest Control Traps Fly trap with natural bait Most effective method of capturing most species of common flies without use of toic substances Unique one-way patented lid is designed to allow flies to easily enter while preventing their escape Bait is composed of fermented yeasts and additives approved for use in the food industry Non-toxic, does not contain insecticides, and is completely harmless to the environment, animals, and humans