Hydrapak

Features

1. You can freeze it to use as an ice pack or fill it with hot water to keep you warm (max temp 60° C / 140° F)
2. Flexible design makes it so light and compact, you'll forget it's in your pack
3. Made of ultra-durable, abrasion-resistant thermoplastic urethane and RF-welded seams for superior durability and elasticity; materials are BPA- and PVC-free
4. Attach it to your pack or hang it via the 1 top and 2 side tie-downs
5. External capacity gauge allows you to track your hydration intake or measure out the contents
6. 42mm screw cap makes it easy to fill and the rigid rim allows for easy pouring
7. Backcountry water filter compatible; Katadyn BeFree Filter (sold separately) screws onto the top, allowing you to filter more water at camp
8. Fold or crush to collapse down and pack into the included 4x4 in. storage bag
9. Lifetime Guarantee offered by HydraPak