The mug that heats itself, so the last sip is as warm as the first

“Indie find: direct-contact heating rather than a warming coaster, at roughly a third of what the name-brand smart mugs cost.”

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The Supsonic self-heating mug is a 16-ounce travel mug with a heating element in direct contact with the liquid, which is what separates it from a mug warmer coaster: it heats the coffee rather than warming the base and hoping conduction does the rest. It ships with a charging coaster, a lid, and a spoon, and it has temperature control so you can pick a holding temperature rather than just on and off. Two safety behaviors matter in practice: a 2-hour auto-shutoff for when you get pulled into a meeting, and dry-boil protection so an empty mug left on the base does not cook itself. It is hand-wash only, and it should not go in a dishwasher or microwave because of the internal electronics. Best fit: desk workers and slow sippers whose coffee always goes cold at the 20-minute mark.