Product Overview: Rambler Tumbler 20oz Straw Lid Any tumbler that's coming along for the ride needs to be tough enough to keep up. Our Rambler® 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 20 oz. Tumbler and its lid are dishwasher-safe for easy cleaning. Our Rambler Straw Lids are built to last and have a molded-in stopper that holds your straw safely in place. And just like our other Rambler Lids, it’s shatter-resistant, dishwasher-safe, and completely free of BPA. Available in Stainless, Duracoat™ colors and Seasonal finishes. Features: 18/8 Stainless Steel: Resists dents and drops. Double-Wall Vacuum Insulation: Keeps cold drinks cold. Dishwasher Safe: To further simplify life.