We've tried several and I find the Zojirushi ones to be the best. Liquids are pretty warm, even the next day, if you swish around some hot water in the carafe before adding whatever you want to keep hot. We've gotten them on Amazon and they have several sizes, from one liter up. Target may carry the smaller ones.
http://www.amazon.com/s/ref=nb_sb_noss_1/176-0689104-9639032?url=node%3D725942&field-keywords=carafe&rh=n%3A725942%2Ck%3Acarafe