The vacuum-insulated Rambler® 30 oz. Stackable Cup is sized perfectly for fewer refills of Texas-sized teas, H20, and XL coffee. It keeps your drink at the right temperature and comes with the fan-favorite MagSlider™ Lid to protect your beverage from splashing. When you’re ready to store it away, save space by removing the lid and stacking it on top of another one just like it. Please note: This magnet slider is not leakproof and will not prevent spills.