Fly Barrel Fly Trap is designed practical and easy to use. Made for outdoor use, it requires no maintenance and is environmentally friendly with bait that contains no poison. Flies may be able to come in the trap but they will not be able to get out. To use, empty the bait into the trap and add water and hang outdoors in sunny, low-wind areas to capture flies. When the trap is no longer attracting flies, empty contents and replace with new bait and water. Perfect for protecting outdoor areas like your backyard, restaurants, corrals, gardens, lawns, barbecues, kennels and patios. This product comes with 2 fly baits.