This $20 Amazon Mug Warmer Keeps Your Coffee Hot All Day, So You'll Never Leave Your Desk

There's nothing worse than sipping on a cold cup of coffee or tea. When you're busy working at your desk, it can be hard to pull yourself away and heat up your drink. That's where this Nicelucky Coffee Mug Warmer ($20) comes in — it keeps your beverage piping hot for as long as you need.

All you have to do is plug in the warmer and choose the heat setting you prefer. Then just keep your mug on the device and it will stay at the perfect temperature.

"I had an old mug warmer, but wound up with an oversize mug because I apparently need to drink a gallon of coffee," one reviewer wrote. "This mug warmer is perfect because it will fit any size cup. It's sleek, looks fantastic, does a great job keeping my beverages warm, and so far seems to be great overall quality! I like that all you have to do to turn it on is set your mug down and it automatically engages."

So what are you waiting for, coffee drinkers? Give this mug warmer on Amazon a shot. We think it's a genius invention.