Designed to lure adult fruit flies, using the special food based liquid lure. Flies that enter the trap can't escape to continue breeding. Traps are most effective when placed near breeding sites and left undisturbed. Place behind or under kitchen counters, sinks, dishwashers, food, near fruits and vegetables, and any other location where fruit is stored. Non-toxic and safe to use around food, children, and pets. For indoor or outdoor use.