VivaTrap! Fly Traps are easy-to-use hanging water traps for control of most species. Simply hang up near trash cans or problem areas, add water, & eliminate flies in a clean, safe manner! Trap is sealable for sanitary disposal when full. For best results, hang 3-8 feet off the ground and 10-20 feet away from eating areas. Traps are effective against house flies, blow flies, cluster flies, flesh flies, stable flies and others.