The World's First Temperature Control Mug. Designed for use on the go, the Ember Travel Mug allows you to set your preferred drinking temperature, then maintains it, so your coffee or tea tastes perfect from first sip to last drop. Specifically designed to feel like you’re drinking from a ceramic mug, with a perfect lip interface and a 360º drinking experience. Ember’s lid is engineered with an open design to allow for easy cleaning. Three options exist: The blag travel Mug or the Black and White Home Mugs.