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Stop Reheating Cold Coffee In The Microwave And Use This Gadget Instead By Jonathan Kesh Oct. 18, 2025 12:20 pm EST

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You may need coffee to get through a busy morning, but some days, it will get cold. There are pros and cons to reheating old cups of coffee , but according to Andrea Allen , coffee expert, co-founder of Onyx Coffee Lab , and 2020 U.S. Barista Champ and 2021 World Barista Runner-Up, the microwave can do a number on your morning joe. Instead, you might consider a coffee warmer: a small, electric heater shaped like a coaster that keeps your mug steadily heated.

Allen explained that coffee is something you should never put in the microwave because reheating it this way can mess up its fla

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