YETI’s 10 oz. Rambler Lowball is a great drinking companion. With double-wall vacuum insulation, it keeps your hot drinks hot, and cold drinks cold longer than standard drinkware. Have a whisky by the fire in the evening and then fill with coffee in the morning. The Lowball and included MagSlider lid are dishwasher safe. The magnet on this lid adds an additional barrier of protection to keep drinks contained and prevent heat or cold from escaping; this magnet component is not leakproof and will not prevent spills.