Review on Stainless Steel Double Walled Mugs by Rip Twin

I recently bought two of these and an immersion heater to use when traveling around Europe. I knew I would stop at some places where there isn't a cup of freshly brewed coffee or tea in the morning and I didn't want to miss out. Just got back from using it for a few weeks and couldn't be happier. I filled one with water, turned on the heat and after a few minutes I was cooking. After a few moments I drank hot tea or coffee. I was pleased to find that the handle does not transfer heat. Even with boiling water, choosing it was not difficult, and the drink stayed hot. This is a great purchase.