Titan Outdoors 16 oz Solid Pure 100% Copper Mug Russian Moscow Mule Cold Drinks Design: Pure copper construction, inside and out; No steel lining or lacquer finish; Sturdy handle; Do not microwave Usage: Pour in ice and cold beverages to keep them cold longer than other types of material; Best for use with cold beverages Benefits: Prevent your drink from being watered down as ice melts; Drinking copper-infused water can have many health benefits; Store in freezer for best results Maintenance: Hand wash only, not recommended for dishwasher; Clean with a mixture of lime juice or white vinegar and salt or various copper creams and cleaners; Lessen tarnish by using and drinking filtered water and filtered ice; Care instructions included Dimensions: Height 4" x Diameter: 3.25"