1 Liter Copper Products Tarnish/oxidize over time, this is Natural for Copper products. Please follow the care Instruction manual for cleaning Copper products. Sample Copper Cleaning powder and instruction manual is provided with every order Healthy Habit: Water Stored Over Night In Copper Utensil Is Essential For Hemoglobin Synthesis, Bone Strength And Immunity Building. Copper Helps In Maintaining Digestive Health, Healing Wounds And Relieving Pains. Copper Is An Antioxidant And Anti-Carcinogenic That Prevents Cell Damage And Slows Aging. Copper Is Primary Element To Produce Melanin (Pigmentation Of Eyes, Hair And Skin) In Human Body. Hammer Finish