I bought two of these for winter hiking and backpacking. Used them for the first time out on a frozen lake near the White Mountains in New Hampshire filming and photographing dog sled races. Used one to hold a one-liter bottle of water and one to hold a one-liter bottle of hot coffee. The coffee stay warm for hours and the water never froze, despite 15° temps.

nhmikep

Wolfeboro, NH

Must-have in my winter equipment. With a standard Nalgene, hot water will still be warm at the end of the day even in -20C (or lower) weather. I've never used it in warm weather, but I'm sure it would be equally suitable to keep drinks cool. I like to use it winter camping where during the night I'll put my Nalgene filled with near-boiling water in this, close to my feet, and open the Water Bottle Parka's top zipper more or less to manage how much warmth I want to let out to keep my feet warm.

Frenchy

QC

great for keeping cold drinks cold and hot drinks hot!

Cyril S

Canada

Chilled my bottle the night before, got up dropped the cold bottle into Parka and went out to the lower elevations and heat of the SL Valley. Drank out of it around noon and then the rest of the day, cool beverage.... Only concern was the condensation I had to drain out at the end of the day, I feel that is a small price to pay for a cool beverage. When the snow falls I'll see how it holds up for a hot/warm drink. MTF

DocRay

Northern Utah

Using this to carry water on my backpack and my ATV. It keeps my water cold despite the brutal summer heat of the deep South.

Kevin

Vicksburg, MS

Perfect to attach water anywhere. Keeps water from freezing. Easy access zipper. Durable.

Rob

Nj

It is a little shorter than I was thinking it would be. I bought this to store my Britta filtered water bottle and it is wide enough tall enough. It fits my smaller water bottle but not the larger one which is unfortunate. It does keep it nice and cold though which is very helpful since the filtered water bottle is not insulated and most filtered water bottles aren't and since I prefer filtered water, I always have trouble keeping my water cold. This product definitely helps solve that problem.

Aimers

Miami, FL

I usually use Zojirushi thermos' to carry tea and hot water while ice climbing and ski touring. I bought this because it's a lighter weight system however boiling water melts nalgene bottles so the water is cooler to begin with and these parkas don't preserve the heat as well as the thermos', the result during ice climbs was that by the end of the day my water was getting cold. On an overnighter my water would freeze whereas in the thermos is would still be warm the next morning. However, on an overnighter I'd likely carry a stove stove the Parka works to keep water liquid for most trips.

Brett the Photographer

Calgary - AB

In a move that surprised no one, Nalgene bottles and Germany-based Hunersdorf bottles give this coozie-on-steroids "two lids up!" for it's insulative value, bomb-proof construction, attachment features, and overall versatility. But seriously, this bottle parka stands neck and lid above the competition for protecting your H20 from turning into a brick in the backcountry. I used it in sub-zero temperatures in Alaska and the Wyoming range and as long as warm water went in, non-frozen water came out - even hours later. The flexible foam construction is great, the zipper lid works well (although I could see issues down the line as it wears more or if it gets wet and then freezes). For keeping liquid in liquid state and keeping those backcountry burritos toasty warm, I'd buy this again. Except I don't need to, because it's an OR product and will probably outlive my grandchildren. And I don't even have kids yet.

Outdoor Educator Eli

Anchorage, AK

Finally! No more frozen water. I've seen countless friends who have one of these awesome bottle holders and always thought they were too bulky and kind of pointless. Then I decided after too many frozen nalgenes to pick one up for myself, it is bulky yes... but its incredibly light weight and keeps your beverages liquid. I've only tested in cold weather but it performed well. I recommend it! Just make sure you get the right one to fit your bottle, its written in the notes.

K Ann

Golden, BC