Product Description Package Quantity:4Your mugs will naturally develop a beautiful patina with use over time. However, if you would like to keep your mugs looking brand new, you will need to take time to care for them. Polishing is necessary to keep the mugs looking new. You can use citric acid as a polish (from fresh lime or lemon juice) or you can purchase barkeeper's friend. Either product will work nicely to keep your Moscow mule mugs looking new. Manufacturer's disclaimer. This product is made of copper and in order to ensure your enjoyment of this product, please note the following: 1. Copper is a highly conductive metal and is extremely sensitive to temperature. It is not recommended that you subject this product to extreme hot or cold temperatures. 2. Copper absorbs material easily and therefore contents stored in, or consumed from this product may over time lose or change their taste. Thus, we do not recommend that you use this product for long-term storage of food or liquid contents. Currently available information suggests that there is no confirmed adverse health risks associated with food or beverage consumption from a copper container. If you believe you have allergies or other health conditions which may be triggered or worsened by consuming food or beverages from this product, you should consult a licensed health care professional, and follow their advice. Product Dimensions7.4 x 7.2 x 4.8 inchesItem Weight1.8 pounds Straight Moscow mule mugs riveted handles100% heavy weight solid copper, food safe lacquered finished for long lasting shineDesigned with smaller sturdy riveted handles that do not freeze your hands while imbibing your favorite cocktails.Perfect size for a Moscow mule - also great for other cold beverages - keeps drinks cold and delicious!Hand made in India