The Lemon Fruit Fly Trap is a lemon-shaped trap that's specially designed to attract fruit flies. This is a ready to use mini dome trap contains a non-pesticide food attractant which is sealed in a polyethylene terephthalate reservoir. A hole that is large enough to allow insects to enter should be punctured in the center. Once they are lured inside, they will be trapped and drown in the attractant liquid because the size and position of the entrance will prevent them from escaping.