Water Bottle uses ‘Jacket Insulation’ for Cooler Drink

As a puffy and fibrous synthetic down, PrimaLoft insulation is most often used in winter jackets for warmth. But a water bottle from Hydrapak adds PrimaLoft in between its double-wall plastic, creating an insulated vessel to keep your water cool.

Called the Wooly Mammoth, Hydrapak released a version of this bottle last year, but it quickly sold out on the company’s site. This year’s Wooly bottle is redesigned, and it will ship to retailers for sale this fall.

Fuzzy PrimaLoft insulation visible through clear bottle shell

I have long used PrimaLoft-insulated jackets, and I trust the stuff to keep me warm. Hydrapak touts similar thermo-regulating benefits with the bottle. It will keep drinks at a more stable temp for longer than a regular bottle, be it hot liquid or cold.

Beyond the puff, this is a pretty normal 20oz. bike bottle design, though with a flexible polypropylene body that’s BPA free. The bottle will cost $16 when it comes onto the market for sale in the fall. —Stephen Regenold

Wooly Mammoth bottle

Stephen Regenold

Stephen Regenold is Founder of GearJunkie, which he launched as a nationally-syndicated newspaper column in 2002. As a journalist and writer, Regenold has covered the outdoors industry for two decades, including as a correspondent for the New York Times. A father of five, Regenold and his wife live in Minneapolis.