Nextmug self-heating mug is over 25% off for Prime Day

I'm not the dedicated coffee drinker I once was, so I've come to rely on a self-heating mug from Nextmug that keeps drinks warm for hours. It’s the only coffee mug I use these days, and Prime Day has it for over 25% off across the available colors; the black version is 31% off.

One advantage over a desktop mug warmer is that the heating element is built into the mug itself. The Nextmug sits on a charging base that doesn't get hot; only the inside of the mug heats up. I briefly tried a desktop warmer and worried that clutter on my desk—wires, my phone, my earbuds—could be nudged onto the hot surface and become damaged.

Off the base the battery will last at least a couple of hours, and the mug offers three temperature settings—warm, hot, and piping—controlled by a single button on the base. You can wash it in the sink, too, as long as it’s dry before you place it back on the charger. If you know a coffee drinker who spends the day at their desk, this is a practical gift; I wouldn’t mind a second one for the living room.

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