The YETI Rambler Tumbler with MagSlider Lid is a double-wall vacuum-insulated stainless steel tumbler built to keep beverages at temperature for hours, hot or cold. The MagSlider Lid uses a strong magnet to hold the slider fully open or closed, reducing spills while still allowing an easy sip. The tumbler's No Sweat Design keeps the exterior dry even when filled with ice water, and its narrow base is sized to fit standard vehicle cup holders. Made of durable 18/8 stainless steel with a DuraCoat color finish that resists fading, peeling, and cracking, it is dishwasher safe for simple cleanup and comes with YETI's 5-year warranty.