-The code of Copper 100 is S-588 -Approx. 208g -Copper(inside plated with nickel) -Dia.87mm x H 90mm -Made in Japan
Care and Usage Instructions for Copper Products
To maintain the quality of your copper products, do not use a dishwasher, as it may damage the transparent coating or cause discoloration and peeling of the internal plating. Avoid using bleach-based detergents or wiping with wet cloths to prevent internal discoloration. After use, hand wash with a neutral detergent and sponge, then dry thoroughly before storing in a dry place to prevent tarnishing or rusting. Do not leave the product in high-salt or high-humidity environments for extended periods, and avoid using abrasive brushes or cleaners on the exterior. If green spots appear, gently wipe them with a solution of vinegar and salt, followed by washing with a neutral detergent and drying completely. Additionally, this product is suitable for cold beverages; do not use it for hot drinks or near open flames. If the cup becomes scratched, discontinue use immediately to avoid injury.
