YETI. RAMBLER 14OZ MUG WITH MAGSLIDER LID. SHARPTAIL TAUPE. The Rambler 14 oz. Mug is one of the toughest most over-engineered camp mugs 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. Like all Rambler Drinkware the 14 oz. Mug and lid are dishwasher safe making them easy to clean. The mug s wide opening means contents are easily accessible but will cool quicker. That s why the mug comes with the MagSlider Lid it adds an additional barrier of protection to prevent heat or cold from escaping but please note -- the magnet component is not leakproof and will not prevent spills.