Beautiful white and black marble outside, stainless steel inside, to keep whatever I take along cold or hot. I absolutely will not leave my home without a beverage. It doesn't matter if it's a short trip or a longer one. I used to drop my bottle into my cozy to keep cold, but on a long trip or hot day, by the time I get back home, my drink is warm. I took this thermal bottle, filled with ice cold pepsi, on an all day outing lasting several hours and it stayed cold. It has easy one hand operation, which makes it easy to sip & secure while driving. Hoping to get years of use from it.