The YETI Rambler 30oz Tumbler with MagSlider Lid is engineered for beverage optimization. You spend time deciding on and crafting the drink you need, so employ a tumbler that will make sure it stays the way you want it all day long. The double-wall vacuum Insulation will keep your coffee at just the right temperature and ensures that your iced drink will stay iced. The MagSlider lid harnesses the magic of magnets to trap in temperatures and create a spill-resistant environment where messiness is a thing of the past. The entire package is dishwasher safe and the magnet slider comes off if you need to get any gunk out. Features of the YETI Rambler 30oz Tumbler with MagSlider Lid Double-wall Insulation keeps cold drinks cold and hot drinks hot No Sweat™ Design makes for a secure grip with no condensation Dishwasher safe Made of durable stainless steel Lid is dishwasher-safe and shatter-resistant MagSlider lid Uses magnets for smooth opening and closing Lid is clear so you can see when it's time for a top off