-100% solid copper
-Many ancient traditions recommend drinking water stored in a copper vessel to improve health. Copper is antimicrobial and studies have indeed found that leaving water in a copper vessel kills off bacteria.
-Storing water in your copper water bottle is a great way to make natural alkaline water which tastes fresh, clean, and pure! However, copper can react with acidic fluids, (anything with a pH of less than 7) so we recommend using only water in your copper cup.
TO CLEAN: We recommend you clean your cup with warm water and a drop of soap before using for the first time. Hand wash is preferred. Copper oxidizes naturally and needs to be cleaned at regular intervals. Sprinkle a pinch of salt on a slice of lemon, allow the salt to dissolve, and then gently rub in on the surface of your cup.