Gather ’round, card-carrying coffee connoisseurs! There’s a self-warming mug I’d be right selfish not to alert you about. Not only are reviewers saying it’s better than the slightly higher-priced ...

They’re also more convenient — I make my coffee and tea at home the vast majority of the time, but now, I pour it into one of the few reusable mugs I tested for this story whenever I want to ...