Before anyone else in the house has awoken, I brew and sip coffee in utter quiet. It is pure magic. And these double-wall mugs are part of the sensory awesomeness of that moment. I love how I can drink a mug of coffee without a handle, because the double-wall glass protects your hands from burning. And I love how it looks like the coffee is suspended in thin air. It's a work of art. It also feels good to hold, and is lightweight (unlike most good mugs). My kids love it for ice water, too, because the double-wall insulates the cold as well as the hot.