Have avoided these bottles for a long time, no idea why because I just got my first one and it is AMAZING! I'm writing a review for my KCcoffeegeek site and before I reinvent the wheel, does anyone know if anyone has posted temperature data for these before? I.e. temperature changes over a period of time. It's my understanding that ice will stay ice for like a day+ and I did a quick test last night where I saw a 20 degree shift in water from 202 to 182 over an hour of time (in a non-pre-heated bottle). Drank two cups of coffee this AM and it stayed nuclear hot with the cafe cap both times for far longer than I needed it to, which was great! In any case, if anyone knows of a review where data like that has been posted can you PM me the link or point me in the right direction? THANKS!!!