Not all steel mugs are created equal, although they may look the same from the outside. At first glance, the Zojirushi Stainless Steel Mug may look like any other vessel you fill with your favorite drink. But, one of the things you’ll immediately notice is how tight-fitting the lid looks and feels. When combined with its superb vacuum insulation, you can be sure that whatever drink you put inside the Zojirushi, its temperature will be maintained for a much longer time. What’s more, you will never worry about spills ever again since the lid secures your drink inside the cavernous chamber.