The Zojirushi Stainless Steel mug is a great insulated drink bottle that holds about 28 ounces of liquid and keeps it hot or cold for hours. With hot drinks open the lid facing away from you because the heat builds up pressure and it could spew at you when you open it and when putting ice full size cubes fit through the neck easily and keeps drinks ice cold for hours. The drink opening in the lid is perfect so you can get a lot of liquid and even fit a straw in it.