The Rambler® Lowball stackable insulated tumbler is the ideal drinking companion. Easy to stack and store, the Lowball’s double-wall vacuum insulation will keep your hot drinks hot, and your cold drinks cold longer than standard drinkware. Enjoy your evening whisky by the fire, and refill with coffee the next morning. Like the entire Rambler® drinkware family, the Lowball and included Magslider™ lid is dishwasher safe for easy cleaning. While the magnet slider adds an additional barrier of protection to keep drinks hot or cold, this magnet slider is not leakproof and will not prevent spills.