Forty Below Bottle Boot
1.0 Liter size


Available in stock

Quick Overview

The Forty Below® Bottle Boot™ 1 Liter size is a high performance insulated bottle cover and holder that helps keeps water from freezing, especially in extreme cold environments. It fits perfectly on the Nalgene 32 oz. bottles,and the German made Cold Weather Water Bottle.   Our 6 sizes of bottle covers have been used on the world’s coldest and highest places, since the 1970’s!

Please see below for additional information and specifications.

1st Color Choice *

2nd Color Choice *


The Forty Below® insulated bottle cover and holder in 1 Liter size, is a very insulating water bottle cover, to help keep water from freezing, especially in extreme cold environments.   It fits perfectly on the Nalgene 32 oz. bottles and the 1 liter German cold weather bottle we sell.

Trusted and used on expeditions and cold trips worldwide for over 40 years.  This insulated bottle cover and holder, which we trademark call the Forty Below® Bottle Boot™ is a unique design that enables the user to easily open with mittens or gloves, with easy access to the bottle, and no zippers to break or freeze.  We make these in 6 sizes currently!

Key Features of the Forty Below® Bottle Boot™ 1.0 Liter Size:

Fits most 1 Liter/32oz. quart size water bottles, such as Nalgene, German Cold Weather bottle (Hunersdorf/KJS), Gatorade, etc.
Helps keep liquids from freezing in cold conditions.
Helps keep liquids cool in warm conditions too!
Low Profile Design.
Thick 6.5mm Closed Cell Neoprene foam insulation.
No zippers to break or freeze.
Webbing belt loop.
Velcro front closure.

To find out more about our complete line of insulated bottle covers, and more information about helping keep liquids in extreme places, please see our All About Bottle Covers Section here in our website!

Image of forty below bottle boot 1 liter with nalgene and cold weather bottle
The Forty Below Bottle Boot 1.o Liter fits both Nalgene 1 qt Bottle and the Cold Weather Expedition 1 Liter water bottle, along with many other bottles similar to this size, such as the 32oz. size Gatorade, Poweraid, etc.


Image of forty below bottle boot on hip belt
Forty Below Bottle Boot on a backpack hip belt with the webbing attachment on the back.

Here is a video we made a few years ago about the Forty Below Bottle Boots:


Here is a great link about our Bottle Boots™ in use at the great gear information site  Click on the link to see the informative video, the segment on the Bottle Boot and the German water bottle start at about 6:30 into the video:


© 2019 Forty Below, Ltd

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Forty Below Bottle Boots 1 Liter in use:

Insulation:  1/4″ (6.5mm) thick stretchy nylon covered closed cell foam (wetsuit type material).  Same thickness completely around the bottle.

Size: Fits most 1 Liter/Quart  size water bottles, such as Nalgene 32 oz. wide and narrow mouth, Hunersdorf 1000ml, Gatoraide 32 oz., etc.

Fits: Bottles up to 3 3/4 inches in diameter and 8 1/2 inches tall. Stretchy material so it can flex with different shapes of bottles.

Colors: Black, Blue, Red, Yellow, Pink, Green, Purple.

Weight: 4.5 oz (126g)

Made in Canada and USA

Additional information

Weight .4 lbs