The YETI 20oz Rambler Tumbler With Magslider Lid is a durable cup for drinks to go. Designed for coffee, the double-wall vacuum insulation provides a safe haven for your bevvy, whether it's hot or iced. The 18/8 stainless steel construction is kitchen-grade, resists punctures and rust, and is ready for the road, fitting in most cupholders. This trusty mug is fitted with the MagSlider Lid to prevent splashes and heat (or cold) from escaping while moving to the next location.