The Yeti Rambler™ 14 oz mug is the toughest, most over engineered camp mug out there. Unlike traditional camp mugs, this double wall vacuum insulated body protects hands from hot or cold contents while keeping coffee, chili, oatmeal - you name it - well insulated. The mug's wide opening means contents are easily accessible, but will cool quicker. That's why the mug comes with the standard Rambler™ 30 oz lid (also compatible with the Rambler™ 30 oz MagSlider™ lid) so you can cap it and keep it hot until you're good and ready.