When you think Primaloft, do you think of water bottles? No? Well, Hydrapak is here to prove you wrong.

The Hydrapak Wooly is not my first encounter with an insulated bottle; I currently own a Klean Kanteen that’s like a tank. If you are looking for something to keep cold beverages cold and your hot beverages hot without adding a ton of weight, the Wooly is for you.

The Wooly bottle is 25 fl. oz of pure insulated awesomeness with double-walled plastic with Primaloft insulation weighing in at 4.5 oz when dry. It has a High-flow Mammoth™ Valve constructed from soft Thermoplastic Elastomer that allows for easy access to the bottle without needing to pull on the valve with your hands. Additionally the Thermoplastic Elastomer is not a magnet for teeth marks, a downside many of these bottle styles have.

The bottle has a wide mouth (60mm to be exact) and makes it easy to clean. This is top rack dishwasher safe and freezer friendly too! Full bottle dimensions are fairly standard: 10.25″ L x 2.75″ W.

The only real problem I found with the bottle was how difficult it was to get that very last drop. Once you get to the last few sips, it is tough to wrestle the water out without extreme yoga skills and squeezing. It’s much easier to stop what you are doing to unscrew the cap. If you’re really on the go and you’re running low on water, this can hinder your performance.

Lastly, the design on the outside of the bottle could be more aesthetically pleasing, but if you’re going for function over form, this isn’t a deal breaker.

All in all, the Hydrapak Wooly is a good deal if you’re looking for a functional and lightweight bottle that you can haul along for hot summer runs and rides to keep your beverages cold, or for those chilly days where a warm beverage sounds incredibly delightful. Buy through Hydrapak for $11.99.

This was sent to me for review.