My ultralight hiker customers like to customize their setups, so I now offer the adapter alone! The silicone grommet seals in 3/8” OD tubing, which is the standard used by almost all the manufacturers including Osprey/Gregory/Camelbak (except the late-model CRUX), and you can buy it at any hardware store!
If you've got a spare tube and bite valve that you like and a wallet that is more ultralight than you'd like, try this variant!
In 2025 I designed rings to fit your 28mm adapter to YETI, Grayl, 42mm Hydrapak/CNOC, Standard-mouth Hydro Flask, Narrow-Mouth Nalgene, 25mm Poland Spring/Deer Park, and 38mm Gatorade/Sports Drink bottles. They’re now available with the 28mm adapter with a little discount and no extra shipping charge.
They’re a great solution if you’re trying to switch from bladder to reusable bottle because you can save money, use parts on hand, and expand your capacity with 28mm bottles when needed!
In November 2024 this adapter got updated with an additional vent and beefier threads that are compatible with even more 28mm bottles. And it fits on the drinking spout of the wide-mouth lid for unparalleled flexibility!
Weight is 9 g (.3 oz)
My ultralight hiker customers like to customize their setups, so I now offer the adapter alone! The silicone grommet seals in 3/8” OD tubing, which is the standard used by almost all the manufacturers including Osprey/Gregory/Camelbak (except the late-model CRUX), and you can buy it at any hardware store!
If you've got a spare tube and bite valve that you like and a wallet that is more ultralight than you'd like, try this variant!
In 2025 I designed rings to fit your 28mm adapter to YETI, Grayl, 42mm Hydrapak/CNOC, Standard-mouth Hydro Flask, Narrow-Mouth Nalgene, 25mm Poland Spring/Deer Park, and 38mm Gatorade/Sports Drink bottles. They’re now available with the 28mm adapter with a little discount and no extra shipping charge.
They’re a great solution if you’re trying to switch from bladder to reusable bottle because you can save money, use parts on hand, and expand your capacity with 28mm bottles when needed!
In November 2024 this adapter got updated with an additional vent and beefier threads that are compatible with even more 28mm bottles. And it fits on the drinking spout of the wide-mouth lid for unparalleled flexibility!
Weight is 9 g (.3 oz)
