I have had my 14 oz Ember mug for over a year. I bought it for the office, and then bought the travel mug about a month later. I just now bought the Ember Mug 2 in stainless steel from the metallic collection for use at home! I love that I can so tightly control the temperature of my tea and coffee. I was hesitant to spend the money at first, but after using it, I can't live without it!!