Question: are yeti cups stainless steel?
Answer: The YETI Rambler® family is tough as hell, and will keep your drinks as cold (or hot) as science allows. With stainless steel construction, double-wall vacuum insulation, and No Sweat™ Design, they're perfect for on-the-move adventures in the backcountry and long days on the water alike. Plus they're dishwasher safe.