Hydrate on the go with a cup for big swigs. The vacuum insulated Rambler 30 Oz stackable cup is sized perfectly for fewer refills of Texas-sized teas, H2O, 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.