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Ever Sip™ and CamelBak®
Ever Sip™ vs CamelBak®: What Actually Changes in Winter
Short answer: it is not either/or. CamelBak® makes excellent hydration gear and you should keep using it. Ever Sip™ replaces the tube and bite valve, so the same reservoir and pack keep working when the temperature drops below freezing.
What CamelBak® does well
CamelBak® has been building hydration packs since 1989 and effectively created the category. The Crux reservoir moves a serious amount of water per sip, the Big Bite valve is easy to use with gloves on, and the packs themselves are built to last years of hard use.
Above freezing there is very little to improve on. If you are hiking, riding or running in conditions where water stays liquid, a CamelBak® does the job and does it well.
What changes below freezing
The reservoir sits against your back, insulated by your pack and warmed by your body. It holds a lot of water with a lot of thermal mass, so it is the last thing to freeze.
The tube is the opposite: a thin column of water about 7.41 mm across, hanging in open air, often catching the wind. It loses heat fast, and the bite valve, the most exposed point, plugs first. This is true of every unheated tube on the market.
What Ever Sip™ adds
One thing: heat, in the tube and through to the bite valve, so the water inside never reaches freezing. Active Heat™ runs off any common USB power bank down to −1°F (−18.3°C).
Our Standard version is built on a compatible third-party tube and bite valve, not genuine CamelBak® components, and it ships with a bite valve cover.
It does not heat your water. Your drink stays cold.
Side by side, in the cold
| Standard CamelBak® tube | With Ever Sip™ | |
|---|---|---|
| Above freezing | Works excellently | Identical — unplug the battery |
| Below freezing, the tube | Water in the tube reaches ambient and plugs, usually at the bite valve | Heated through to the bite valve cover, so it cannot solidify |
| What you have to remember | Blow water back after every single sip | Nothing |
| Your reservoir | Keep it | Keep it |
| Your pack | Keep it | Keep it |
| What you replace | — | The tube and bite valve |
| What it is built from | — | Compatible third-party tube and bite valve, plus a bite valve cover |
| Power needed | None | Any 5V USB power bank, 1 to 3A |
| Runtime | — | About 12 hours on a 10,000 mAh bank |
| Minimum operating temp | Freezing is the practical limit | −1°F / −18.3°C |
| Your drink | Cold | Cold — only the tube is heated |
Common questions
Do I need to replace my CamelBak® reservoir?
No. You keep your reservoir and your pack. Ever Sip™ replaces the tube and bite valve, built to the standard 0.292 inch (7.41 mm) inside diameter that CamelBak® and most other brands use. Choose the Standard version at checkout.
What exactly am I getting?
A heated tube and bite valve as one assembly, plus a bite valve cover. To be straight with you: the Standard version is built on a compatible third-party tube and valve rather than genuine CamelBak® parts. It fits CamelBak® reservoirs because the industry shares a standard tube diameter, not because we source from CamelBak®.
Is CamelBak® bad in the cold?
Not at all, and we would not claim that. The tube freezing is not a CamelBak® flaw, it is physics that affects every unheated hydration tube regardless of who made it. A thin column of water hanging in open air loses heat far faster than the insulated reservoir against your back, so it is always the first thing to freeze.
Does it make my water hot?
No. Active Heat™ warms the tube and bite valve, not the water. Your drink stays cold and refreshing. The point is only to stop the water in the tube turning solid.
What power bank do I need?
Any standard 5V bank, drawing between 1A and 3A. A 10,000 mAh bank runs it roughly 12 hours, a 5,000 mAh bank about 6 to 7.5. Keep it in an inside pocket, because cold reduces usable battery capacity.
Here is one we have used and can recommend: Anker 10,000 mAh power bank with USB-C and USB-A output. Affiliate link: we may earn a small commission, at no extra cost to you.
