<p>Copper drinkware is only suitable for water, not for example milk, citrus juices, and acidic liquids.</p> <p>Do not wash in the dishwasher. Clean with natural soap, a soft sponge, and room temperature water. Do not expose to direct sunlight.</p> <p>Due to natural oxidation, copper changes color over time. The material may also start to show stains. These are both natural properties of copper and have no negative effect on drinking from a copper bottle or cup. There may also be irregularities in the material: this is part of the natural properties of copper.</p> <p>Handmade in India<br /> These unique copper drinking bottles, jugs, and cups have been handmade in India for centuries. Precisely because it is handmade, each item is unique and may therefore differ slightly from the photo.</p>