YETI Rambler 10oz Tumbler with MagSlider Lid - Savor those day-saving espresso shots with a tumbler primed for the job — the Rambler 10 oz. Tumbler. Insulated to keep the steam on your caffeine and comes with our customer-favorite MagSlider Lid to protect from any splash out, because surprise speed bumps are very real. Features 18/8 Stainless Steel Double-Wall Vacuum Dishwasher Safe Has a magnet for easy opening and closing.