100% COPPER--No nickel, no stainless steel! These copper mugs are the real deal--drink the Moscow Mule the way it was meant to be enjoyed, with a handcrafted pure copper mug. Keeps the drinks ice cold! Many uses for these copper mugs: NUMEROUS USES--Our Copper Mug works great for chilled beer, iced coffee, iced tea and any vodka, gin, rum, tequila, or whiskey mixed drinks. Additionally, many experts tout the benefits of drinking water from 100% copper drink ware. Our copper cups feature a smooth lip that lets you drink in comfort, unlike the sharp edges found on other mugs. No rivets on handles, food grade lacquer is outside of the mug to keep its shine and resists tarnish when washing