The YETI Rambler Tumblers are made with kitchen-grade stainless steel and double-wall vacuum insulated and come with a lid. These tumblers keeps ice 2 times longer than a plastic tumbler and are designed for maximum ice retention. These tumblers work for hot beverages as well. This YETI Rambler Tumblers are BPA free and features a No Sweat design. They come equipped with the dishwasher safe and shatter resistant YETI MagSlider lid. This lid uses the power of magnets to keep your drinks locked in and for smooth opening and closing.