Ember’s smallest self-heating mug is on sale for just $33

Woot is selling Ember’s six-ounce temperature-controlled Cup in black for $32.99, a $67 reduction, through 7 November. The deal makes Ember’s premium self-heating drinkware more affordable, while the compact, handle-free design is aimed at espresso-based drinks or smaller servings.

The cup lets users set a drinking temperature between 120 and 145 degrees Fahrenheit through an app and remembers the setting for later drinks. It maintains the chosen temperature for up to 95 minutes on a charge, four hours with a lid, or all day on its charging dock; it enters sleep mode after two hours of inactivity. Woot offers a 90-day warranty, and code COOK takes a further $20 off orders of $100 or more in its Home and Kitchen Sale. Despite its IPX7 water-resistance rating, the cup must be hand-washed.