The Nathan FlexShot Bittle is a unique bottle that features a soft, squeezable design that packs completely down for easy transport. You'll enjoy the soft, pliable feel of this inventive design. Insulated silicone helps it keep water cooler longer. Comes with a leak-proof, soft-sip, high-flow nozzle. Sip-friendly narrow spout offers easy drinking. Wide mouth allows easy cleaning and filling. Dishwasher safe on the top rack. BPA-free with odorless and tasteless technology.