Convenient belt clip on back. Fits in bicycle water bottle holders. Spill Proof. 1.Unscrew bottle and fill with water 2.Replace Bottle and tighten securely 3.Holding bottle by grip, flip tray completely away from bottle 4. Squeeze bottle gently to release desired amount of water into tray. 5. When finished, return bottle to upright position and flip closed so that bottle nests in tray for automatic leak-proof portability.