20 oz YETI Rambler / 591 ml Tumbler 20ozYeti thermal insulated travel mug hot or cold beverages, dishwasher safe, easy clean, warranty, most stars. The original OG tumbler that made YETI famous. Any tumbler that's coming along for the ride needs to be tough enough to keep up. Our Rambler 591 ml 20 oz. 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, the 591 ml Tumbler and its lid are