I can’t live without my Ember mug and it’s still $40 off after Black Friday

By the time the winter months come around – and the cold temperature seeps into my bones and nights get earlier – there’s only one gadget I use more than my Kindle Paperwhite (because, of course, I’m cozying up under a blanket and devouring ‘The Hunger Games’ for the umpteenth time). That product isn’t a phone, tablet, my smartwatch, headphones or anything else mainstream: it’s a mug.