18oz Soft Flask with Bite Top

Built for trail runners and endurance athletes who want no-fuss hydration without the bulk, the 18oz Soft Flask is our pick for vest and belt systems. The pliable TPU body compresses as you drink, killing slosh and reducing bounce on long miles. A high-flow bite valve seals automatically, so you stay moving without worrying about drips.

• 18 oz (500 ml) capacity fits standard front vest pockets and running belts — compresses down as fluid drops to cut bounce and bulk
• Durable TPU construction handles both freezing temps and warm liquids without cracking or warping
• High-flow bite valve delivers fast fluid on demand and self-seals after each sip to prevent leaks
• Standard 28mm opening makes it easy to fill on the fly, drop in ice cubes, and clean without tools
• 100% BPA-free and PVC-free — no chemical taste, no matter how long fluid sits inside