
Originally Posted by
Funkstar
I've always wondered about the thermal interface between the cup and the USB warmer.
Most cups have a rim around the bottom, meaning they don't make very good contact with the warming plate. How would this effect the devices ability to keep your beverage warm?
Should you adopt a flat bottomed cup for use with these devices? Or are they designed to take the lip into account?
Obviously you could fill the void between cup and heater with thermal goop, but that is going to get very messy. Any other ideas on how to improve the efficiency of these?