You are using a web browser we don't support. Please use the latest version of one of these browsers.

Mozilla Firefox

Google Chrome

Apple Safari

Microsoft IE

Back to top

This product is no longer available, but don't go just yet.


  • SnapFlask module technology features easy release and snap-in replacement to the docking base (included) for effortless access
  • Docking base/module attaches securely to Amphipod belts and any 1.5 to 2-in. wide belt or strap on a backpack or waistpack
  • Docking base allows vertical or horizontal attachment positions
  • Each flask has a wide, 35mm mouth that makes it easy to fill and clean
  • Includes two 10.5-fl. oz. bottles for a total of 21 fl. oz.
  • Polyethylene is 100% BPA free


View all Amphipod Running Water Bottles

REI membership


Best Use Running
Liquid Capacity (L) 0.62 liter
Liquid Capacity (fl. oz.) 21 fluid ounces
Dimensions Unavailable
Fits In Cup Holder Yes
Water Bottle Material Soft Plastic
Material(s) Low-density polyethylene
BPA Free Yes
Bottle Opening Narrow
Water Bottle Cap Type Push/Pull
Weight 4 ounces

The REI Difference

100% satisfaction guaranteed

We stand behind everything we sell. If you are not satisfied with your REI purchase, you can return it for a replacement or refund within one year of purchase.

REI's guarantee doesn't cover ordinary wear and tear or damage caused by improper use or accidents.

If your item has a manufacturing defect in its materials or workmanship, you can return it at any time. See our limited warranty.

Gear & advice you can trust

At REI, we live and breathe the outdoors, and we're passionate about sharing our expertise with people of all skill levels. Whether you're new to the outdoors or a seasoned explorer, we'll take the time to understand your needs and help you find the right gear for you.

10% annual member refund

Anyone can shop at REI, but for a one-time $20 fee you can become an REI member and enjoy a lifetime of benefits. These include an annual member refund, typically 10% back on eligible purchases.*



*10% is typical but not guaranteed. Your refund is based on eligible purchases, which exclude REI gift cards, services, fees, REI Adventures trips, REI Garage, and discounted items. Learn more