Nalgene Wide Mouth Cantene 48 Oz

My p bottle.
This is the mountaineer's favorite bottle if you hate stepping out of your tent to go to the bathroom. It rolls up to a small size and gets the job done. 48 ounces is the right size. You will regret using a 32 ounce bottle because I've filled it up before! The wide opening is what you need for the task. I don't think there's another collapsible wide-mouth bottle on the market.

Lightweight alternative!
I am sorry to see that this bottle doesn't get more attention. It weighs less than 1/3 that of a regular 32 oz. Nalgene Tritan and has the capacity to hold 50% more, while still having the traditional wide mouth Nalgene lid. I find myself using these more and more to cut weight, and on trips where more water is required. I also use them in pairs to slip into hydration bladders to create a nice even wall of water in the bladder sleeve, instead of a tube shaped bag of water. Very durable, stands up right on its own when filled, lighter than a 32 oz. Nalgene Tritan, with 50% more capacity, what more could you ask for? Highly recommended.