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Quantity
1
Lightweight polypropylene cap: Reduces overall pack weight for ultralight hiking
TPU tether: Physically secures the cap to the bottle, preventing loss or injury
Universal compatibility: Threads onto 28/410 bottles, Smartwater, Lifewater, and most narrow mouth bottles
One-handed operation: Easily opens with one hand for convenience in the field
Reliable sealing: Flat silicone gasket ensures a secure seal as the bottle ages
Summarized by Shop
Some hikers have a favorite trail bottle they're never giving up. The stock cap is the weak link: it's not tethered, and it's usually the first piece to go missing. The Cap & Tether is a 7 g polypropylene upgrade with a TPU tether that stays physically attached to the bottle, so even if you fumble it, it won't end up in a creek. Threa
Weight
7 g
Material
Polypropylene cap, TPU tether, silicone gasket
Compatibility
Fits 28/410 bottles, Smartwater, Lifewater, most narrow mouth bottles
Seal
Flat silicone gasket
Color
Black
Summarized by Shop
4.9
34 ratings
5
4
3
2
1
Works better than any other tether I have found. Heating the tether for a second or two with hot water makes it easier to attach to your water bottle.
M
Mary · 16 days ago
Caps are great. Had one that leaked on my Igneous NOBO bottle, sent an email to support and the caps was replaced as well as the bottle and Ray even threw in a token gift to compensate for the aggregation. I also have a hang kit for my cnoc bladder for water filtering and it’s been clutch. Great products and great customer service. Igneous is a win win in my book.
B
Bubblescout · August 4, 2026
I had a cap and tether for my Smart Water bottle I liked, but the plastic split and it was no longer usable. So I ordered a different one and it leaked right away. But THIS cap and tether is hefty plastic with a solid gasket that does not leak at all and I feel like it won't EVER break. My only wish is they'd make a blue version!
