The Best Backpacking Water Bottle
The thru-hiker's open secret: a cheap 1L Smartwater bottle is light, tough enough, and screws straight onto a Sawyer Squeeze. · Updated June 27, 2026
Smartwater bottle
Smartwater 1L bottle
★star.shop pickReddit favorite
Pros
- Extremely light — roughly 34–44g empty for a full liter, a fraction of a Nalgene's 6 oz
- Threads screw directly onto the Sawyer Squeeze and most popular inline filters, making it the de facto thru-hiker standard
- Slim profile slides easily into pack side pockets and shoulder-strap pockets
- Costs about $2 and is available at nearly any gas station or grocery store, so replacing or resupplying is trivial
- Surprisingly durable — many hikers report a single bottle lasting an entire AT or PCT thru-hike
- Sport-cap versions allow easy one-handed drinking on the move
Cons
- Single-wall plastic offers no insulation and can pick up an off taste if left in the sun for long periods
- Not as puncture-resistant as a hard bottle — a real concern in sharp, rocky desert terrain where a failed bottle could be dangerous
- Cannot hold boiling water, so you lose the sleeping-bag hot-water-bottle trick that a Nalgene allows
Minor nitpicks
- Technically a single-use bottle, so it isn't 'buy it for life' — though hikers routinely reuse the same one for years
- Sport-cap hinges can break and caps can go missing, so carrying a spare cap is wise
- Reusing the same plastic bottle long-term raises the usual microplastics/BPA concerns some users prefer to avoid
The other picks
- r/BuyItForLifeNalgene 32oz Wide Mouth — Virtually indestructible, holds boiling water, lasts decades, and is the runaway BuyItForLife favorite
- RedditCNOC Vecto 2L + Nalgene combo — Some experienced hikers find squeezing a Smartwater through a filter awkward and prefer a wide-mouth dirty bag with a Nalgene for clean water
- RedditHydrapak Stow 1L — A reusable, tough, leakproof Sawyer-compatible bottle for those who want a non-disposable option