High-Quality Material: Each Moscow Mule mug is crafted with a pure copper lining and a stainless steel interior, ensuring it's completely odorless, eco-friendly, offers absolute drinking safety, and is easy to clean. Maintain Temperature: Cocktails and long drinks can be served refreshingly cool in these copper mugs. Thanks to copper's excellent conductivity, the coolness is optimally distributed throughout the mug. Handmade Craftsmanship: Each mug is intricately handcrafted, offering absolute longevity and durability through precision. Enjoy your authentic Moscow Mule mug with a polished finish. You deserve this drinking cup set. Great Design: The strong, stable handle is perfectly sized for a natural and comfortable grip, whether you're male or female, with small or large hands. We designed it to be the ultimate way to enjoy a true Moscow Mule. Absolutely Leak-Proof: The handles are hand-welded, not riveted, preventing any leaks. On the exterior, a food-safe lacquer protects the mugs' surface from oxidation.