GSI Outdoors Glacier Cup - Stainless Steel

A bit heavy but the durability and flexibility is more important to me.

I got one of these for my wife and myself. We liked them so much that we got them for everyone in my family before our family hiking trip in Idaho. Everyone thought they were great and they were very convenient. Mine DOES fit a 64 oz Nalgene but I've read other reviews that say they don't. Not sure why some match and some don't. Light and one of the most handy items you'll have with you. I did pay more than what STP is offering these cups for and had a hard time locating enough online for everyone in my family. THIS IS A GREAT BUY!!

These are great cups, one advantage is that I can use it on my MSR and cook with it! lexan is great but try putting on a stove...big mess.

this would work fine as your only vessel

Very packable.