This Funnel is an easier more convenient way to fill various sizes of reusable bottles. Dual Thread allows fitting on both 28/400 and 24/400 neck finishes. Enjoy wobble free filling with a funnel that fits most 4 to 32 ounce bottles. The Jax Wax Filling Funnel comes with a built in hook that attaches to jug handles to prevent loss. Made of Polypropylene.