Discover the exquisite blend of beauty and functionality with our Wavy Pure Copper Tumbler, showcasing a shiny mirror finished pure copper surface that will develop a beautiful natural patina over time. Each 350 ml tumbler is meticulously crafted by artisans, ensuring a unique piece that stands out in any collection. This copper glass elevates your drinking experience while offering the health benefits associated with copper and silver. Individually handmade, ensuring a unique and personal touch in every piece. Perfect for enjoying both your favorite hot and cold beverages. Leverages antimicrobial properties of copper and silver for a healthier drinking experience. Made from sustainable materials, fully recyclable, supporting eco-conscious living. Using Copperware Or Silverware: Copper and silver are known to be very reactive, the surfaces can tarnish quickly and become a darker color. The natural oil in our hands and the droplets of liquids left unwiped can accelerate the oxidation on the surfaces. Therefore we recommend regular use and immediate cleaning in order to maintain the shine of your products. While using you are polishing the surfaces with your hands, and if you do not air-dry your products you will experience less watermarks in your products. General Cleaning : Use mild dish soap and warm water to clean the cup, rub with a soft cloth or a sponge. Avoid abrasive materials, as they can scratch the copper and the silver plating. Please do not use harsh chemicals or abrasive cleaners, avoid bleach, vinegar, or any cleaners containing ammonia. Copper 100%