The Stainless Steel Insulated Mug takes all the best properties of our favorite mugs and rolls them into a camp-friendly design. They feature a strong stainless steel lining with BPA-free lid and an insulating, non-slip EVA foam sleeve. The sleeve is removable for easy machine washing and is soft so they pack quietly inside all of MSR cookware. Holding a full 12 ounces, they’re available in colors to personalize your set and come standard in all Flex™ Cook Systems. WT: 4 oz., 12.5 fl oz.