Victor® patented non-poisonous bait is the most effective bait on the market it out-performs competitive products 20 to 1. Simply empty the bait into the Victor® Fly Magnet® trap and add water. The result creates a scent that flies cannot resist. Once trapped, the flies drown in the water-based mixture. Safe around children, pets and the environment. For outdoor use with the M382 Victor® Fly Magnet® trap.