Milk Jugg Trap Twin Pack The easy, economical way to catch over 35,000 flies. Catches over 2.5 times as many flies as Rescue® Fly Trap*. Set on the ground or hang up. Insecticide-free. Reusable. Includes attractant flies can't resist. Easy to use - just add water, attractant and pop on the top. Turn ordinary plastic jugs into effective, insecticide-free fly traps!