Best 300-350ml flask for bike/in camelbak?

What will keep a drink HOT longest in your experience? Will any keep a drink hot if in a bottle cage (i suspect not)

I would like the cup with lid type preferably but this is not set in stone

Bump

I use a Paul Comp insulated bottle which comes with both a leak proof loop lid and a ‘Café’ lid.

They’re made by Klean Kanteen who claim it can keep a hot liquid hot for up to 6 hours.

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IMG_0083[/url] by Ample Brew[/url], on Flickr

Contigo Travel Mug – I use one of these for everyday use, keeps my coffee at a perfect temperature for hours and reasonably leak proof with the lock feature if you keep the lid clean of gunk.

Zojirushi flasks are simply the best but they’re hard to get hold of and stupidly expensive. I got one after a recommendation on here and none of my other flasks have left the cupboard since. Think mine’s about 350ml and has a lid. Cost about £30 but it’s all metal, so I’ll never have to buy another.