Ember’s self-heating smart mug is more than $50 off ahead of Mother’s Day

"The Mug 2 can keep coffee, tea, cocoa, and other drinks warm for as long as you’d like. | Image: Ember Coffee is what gets many of us through the workday, and a proper smart mug can keep it hot for hours so you can maintain your focus without constantly getting up to reheat your cup. Thankfully, i"