The Ember Mug 2 is the type of smart gadget you don't know you need until you actually try it - the smart mug is incredibly useful.

you may not need the top-of-the-line mugs, but if you want that coffee hot all day, investing in a good vacuum-insulated mug or bottle will be the way to go. Do ceramic travel mugs keep coffee hot?

When I walk into any coffee shop ... the few reusable mugs I tested for this story whenever I want to take it with me on the go. Not only does that save money but it keeps my drink hot or cold ...