All my balloons are BRAND NEW deluxe helium quality from the manufacturer. They are not filled, you can fill at your local store, or rent a helium tank from your local party store or welding company. You can also air fill them and tape to the wall or attach balloon sticks. Please note that mylar balloons last about 1-2 weeks when filled, although actual float time varies. The latex balloons will last about 8-12 hours once inflated, so be sure to inflate those just prior to your party.