The LifeStraw Peak Series Collapsible Squeeze Bottle is an all-in-one water filtration and storage solution for backcountry adventurers. Use it as a water bottle, filter, or straw, or connect it to other Peak Series systems for maximum flexibility on the trail.
In our tests, it performed well for a non-insulated design—it’s lightweight and fits into the side pocket of most backpacks. But it’s not as easy to carry as some of our top picks. For a quality collapsible squeeze flask, check this out.
Insulation
We were surprised that collapsible bottles weren’t among the most insulated models we tested. The 17 oz Hydrapak Stow and 25 oz Nomader Collapsible were two of the most miniature insulative models we evaluated, reaching temperatures 40 degrees above ambient air temperature during our testing. In contrast, the insulated Klean Kanteen TKWide and Brita Stainless Steel Filter Bottle were among our top-rated performers. The Owala FreeSip and Waatr Crazy Cap Pro were also insulative, and we gave the latter a special nod for its triple vacuum seal, which adds to insulation.
If you’re not interested in a collapsible design, the CamelBak Chute Mag Renew and Nalgene Wide-Mouth are reliable choices for backcountry hiking. Both are lightweight, easy to drink from, cup-holder- and side pocket-compatible, and come in a good selection of colours and capacities. However, the Chute Mag isn’t insulated, and its flip-cap mechanism can wear down over time. It’s an excellent option for day hikers, but we’d opt for something more rugged and durable for thru-hiking. For a quality collapsible squeeze flask, check this out.
Design
The FlexQuench flask is a sporty and functional option for training, jogging or globetrotting. Its collapsible design makes it easier to cram ice cubes in and more convenient for washing. You can toss it in the freezer for an extra icy boost or even use it as an ice pack. It has a small loop on the cap for your finger or a carabiner to clip it to backpacks and gear.
This model also features a durable nylon strap that cinches down for a secure grip on sweaty hands. It is the best water bottle for hiking or trail running when you want to be self-sufficient and reduce the need to purify water in streams. It is also a good choice for day hiking or through hiking, as it can be easily carried in your backpack without strain.
The Collapsible Squeeze Flask From LifeStraw
Plenty of water for long trail runs or backcountry jaunts is critical for self-supported runners and backpackers. However, hauling a bunch of hydration can add up to a significant amount of weight on the back (especially if you’re drinking an average of 750ml per hour). That’s why we love this collapsible squeeze flask from LifeStraw, which scrunches up into nearly nothing and saves a lot of space in the pack.
The Peak Series Collapsible Squeeze Bottle combines a soft, collapsible bottle with a LifeStraw membrane microfilter that inserts into the cap with a drinking spout for a streamlined design that doesn’t require extra packing material or bulk. The soft bottle has measurements printed so you know exactly how much you’re drinking each day, and the capacity is enough to keep you hydrated even on a 6-hour run. For a quality collapsible squeeze flask, check this out.
It’s a bit larger than other soft bottles, which can prevent it from fitting into cup holders or side pockets in some hydration packs. Still, its light, compressible build makes it the ideal companion for ultrarunners and backpackers who want to minimize their pack’s load.
This lightweight, insulated bottle is an excellent all-around option that’s easy to carry, cup-holder and side pocket-compatible, and comes in various colours and capacities. It’s made from durable materials and rated to keep cold water cold and hot water hot, and Owala backs it with a limited lifetime warranty in case of damage or leaks. However, we wish the insulated lid had a larger carrying loop to accommodate a knapsack strap or carabiner, and the straw-equipped opening can leave a metallic taste in your mouth over time.
While the Katadyn BeFree is a popular pick for those who enjoy filtering their water on the go, we prefer the collapsible, hard-sided plastic body of this LifeStraw model.