We over-engineered these double-wall insulated tumblers with an 18/8 stainless steel body, which means your drink still keeps its temperature no matter how much of a beating this cup takes. These YETI Ramblers come standard with our YETI MagSlider Lid, the only drink lid that uses the power of magnets to keep your water, beer, or favorite drink on lock. Made with PFAS Chemicals. Does not ship to CA or NY.