YETI Rambler 24 oz Mug with MagSlider Lid in Limited Edition Big Sky Blue 18/8 Kitchen-grade stainless steel construction for extreme durability Double-wall vacuum insulation keeps your beverage hot or cold DuraCoat™ Color Technology is built to last with no chipping, fading or cracking MagSlider™ Lid uses magnets for easy opening and closing, and keeps your beverage cold/warm longer No Sweat™ Design keeps your hands and cup dry