I have the:

Nissan Travel Companion 0.79-Quart Stainless-Steel Insulated Bottle

http://www.amazon.com/exec/obidos/tg...arden&n=507846

It fits in the carbon/plastic cages. It has a *real* vacuum, not just a partial vacuum with carbon like most of the ones sold in stores. Of 3 thermoses, it keeps coffee hottest longest. Since its all stainless steel, its very light, and it also fits easily in my backpack or the beverage straps of my messenger bag.

Good luck!
Mark