Victor Poison-Free Reusable Yellow Jacket & Flying Insect Trap is reusable to offer long term protection against flying pests. The trap controls yellow jackets, flies, and fruit flies. For your convenience, it’s easy to use – just add water to the fill line and bait of your choosing (recommendations on packaging for each target insect). The trap is ideal for protecting you during picnics, camping, cookouts, and other common yellow jacket gathering areas.