The Ember Mugs feature a familiar design with simple smarts. They keep your coffee hot. These clever devices offer precise temperature controls through the app, so you can fine tune your coffee or tea drinking experience. Or you can just maintain your drink of choice at the right temperature if you forget about it over the course of the morning. We dive into the details of the different cups in the lineup, so you can decide if any of the models are right for you. We talk through size, battery life, finish and more of the 10 oz, 14 oz, and travel mug varieties.