Outdoor Products Insulated Water Bottle Holder
Here's what other sites are saying:
This Outdoor Products insulated water bottle holder will help keep your favorite beverage hot or cold. Sized to hold most 0.5-liter water bottles, holder also fends off freezing in extreme cold. Webbing loop with rip-and-stick attachment system lets you attach holder to a backpack waistbelt. Use hook to hang holder from just about any strap or loop. Zippered top secures bottle. Side mesh pockets stow small essentials.