Quote Originally Posted by TsPoet View Post
I love love love the Nissan Leak-Proof BackPack Bottle to keep my coffee HOT. I never thought of it to keep water from freezing, but it sure would work. It even has the ridge for the water bottle holder and I find it works great on a bike. (interesting, since that isn't its intended purpose). It has a really great flip top lid that makes drinking on the bike, then resealing easy.
Can get it from Sweet Marias, I'm sure from other places as well.
http://www.sweetmarias.com/prod.trav...-bottles.shtml
not cheap, but truly works for coffee anyway.
I gave one to a friend for Christmas last year. Her complaint is that it keeps her coffee too hot.
I have this and I love it. Just got to make sure you wash it out each night or the rubber on the top will absorb odors. It really does keep coffee hot even when I am biking in the freezing cold. I pour my first cup of coffee/ tea into a mug. Also as long as there is no liquid in the top seal before you close it, it is 100% leak proof- although I guess it isn't really a leak if it isn't thoroughly dried.

I haven't actually put it in my bottle holder, just in a pannier, because I have been too scared of scratching it. Silly I know but it is so pretty.