In the end, the ceramic mug comes out as the most eco-friendly choice, but only if you keep using it and maybe even use it more than once between washing. (I'd suggest rinsing between uses.

My coffee mug needed a firmware update. Not the usual start to my caffeine-fueled day, no, but a side-effect of Ember's ceramic mug, an app-controlled kitchen addition to the Internet of Things.

The Ceramic Mug is embedded with a number of temperature sensors and a microprocessor-controlled, dual-band heating system, which promises to keep your coffee or tea at your preferred temperature.