Nalgene 32 oz Narrow Mouth Water Bottle, Amethyst

Why it's worth it

Same Tritan build, same 32 ounces, same lifetime warranty — just with a smaller opening and a slimmer profile. It slides into bike cages and pack side pockets, and you can drink from it on the move without wearing half of it.

Try pulling a bottle out of a backpack side pocket at a trailhead and you learn the difference fast. The narrow mouth is the shape that fits: published gear testing at OutdoorGearLab notes that narrow-mouth designs seat in standard bike cages and pack pockets more reliably than wide ones. If your bottle spends its life in a cage, a pocket or a sleeve, this is the one that stays put.

Drinking from it is simply nicer. The smaller opening meters the water instead of dumping it, so you can tip it back while you're walking the dog or standing at a bus stop and not soak your shirt. Owners who've switched from the wide mouth mention this over and over. It's a small thing that you notice ten times a day.

From our review of 6 nalgene bottles

What we like

• +Try pulling a bottle out of a backpack side pocket at a trailhead and you learn the difference fast
• +Drinking from it is simply nicer
• +Everything else carries over

What to know

• –Cleaning takes more thought
• –A few owners mention that the factory label leaves sticky residue on the lower half of the bottle