Freezing water bottle

[7rider]

Ooooh.
That is neat.
I use a crummy cheapo vacuum sealed thermos from Ikea. It also rattles a bit, but waterbottle cages can bend...your friend should squeeze the cage around the bottle some (assuming she has metal cages).
I also have tried the Soho mug from Trek, but it's just a travel mug and doesn't keep coffee hot on a cold day.
I don't think I'd recommend it for the OP, either.

[Geonz]

I go with a camelbak with insulated hose.

[GLC1968]

I'm bumping this back to the top to thank TsPoet for the recommendation!!!

I just used my backpack thermos on my bike this morning and it worked great! It rattles a little in my bottle cage, but nothing too annoying. I'll try bending the cage a bit and I'm sure that'll secure it. But it didn't leak even a tiny bit and it is keeping my coffee super hot!!

The packaging said it would keep liquids hot for 8 hours and cold for 12 (I think). Sounds like I've got a winner here!! Thanks, again.

[Eden]

I bought one of the leak proof backpack bottles at the beginning of this winter (Thanks TsPoet!) and I love, love, love it. It keeps hot stuff hot for hours, even when its miserable 39degrees and raining here. I bought a piece of neoprene and sewed a little sleeve for mine to keep it from rattling around too much (I used an old sock before I bought the neoprene). I got a little razzing from my teammates at first, but hey, when we were all standing around freezing, waiting for someone to change a flat and I could pull out my nice hot tea - who's laughing now

I did find that I did not want to pull it out while riding to drink - because it keeps things *too hot* to not risk burns.... I suppose I could temper that by not filling it with boiling hot drink in the first place, but then it might not stay warm as long (I've had stuff in there that has still been warm the next morning though!)