Yeti Rambler 20 Oz is the perfect thermal tumbler for adventures! Any glass that participates in adventure needs to be strong enough to keep up. The 591 ml Rambler® tumbler, a Yeti fan favourite, is made of robust stainless steel with double-walled vacuum insulation to protect the temperature of your drinks at all costs. Like the entire Rambler® tableware family, the 591 ml glass and MagSlider™ lid are dishwasher-safe for easy cleaning. Although the magnet on the included MagSlider™ lid adds an extra barrier of protection to prevent spilling drinks and prevent heat or cold from escaping, please note that this magnet is not an airtight component and does not prevent spills.