Days on the dock are made better with the Rambler 30 oz (887 ml) Tumbler. It'll keep your dinnertime drink cool well past sundown or your coffee piping hot throughout the morning. The Rambler 30 oz. Tumbler is made of 18/8 kitchen-grade stainless steel, has double-wall vacuum insulation, and No Sweat Design. No matter which YETI cup you choose, our Ramblers are dishwasher safe, BPA-free, and ready for just about anything.