120 Day supply. 4 Lures last up to 120 days (1 lure packet per use. Replace after 30 days). Just add water. Stops fruit flies from multiplying. The Raid Fruit Fly Trap protects fruit and reduces fruit flies. The Raid Fruit Fly Traps captures the flies and keeps them out of sight. Once water is added, the trap is effective for up to 30 days or until the trap becomes full, whichever comes first.