Any tumbler that's coming along for the ride needs to be tough enough to keep up. The Rambler 20oz. is made from durable stainless steel with double-wall vacuum insulation to protect your hot or cold beverage at all costs. Like the entire Rambler Family, 20oz. tumbler and its lid are dishwasher-safe for easy cleaning. While the magnet on the included MagSlider™ Lid adds an additional barrier of protection for keeping drinks contained and preventing heat or cold from escaping. **MAKE IT YOURS** Let Mammoth Graphics give your Yeti Rambler a permanent, personal touch with a monogram, custom text or your own logo for only $15 more ! *See Laser Engraving Information section below for more info*