This organic ant bait station comes with 20ml of ant bait liquid. This bait station should be placed close to ants nest or on their natural trail. The ants will take the bait and carry it back to their nest where the active ingredient, spinosad, will exterminate the entire nest. The active ingredient will kill insects that come into contact with it or ingest it. The transparent lid of the bait station is to allow visibility of bait and increase bait consumption. Stations are filled with the solution and placed close to ants nest or on their trail for ease of use. These bait boxes are refillable and can be used both indoors and outdoors. They have proven to be effective on patios and balconies.