All the patinated objects are made from a silver plated brass, which was then treated with patina. All items are finished with a special wax to protect the patina from tarnishing and from fingerprints. 
Please note that over time and use the patina will change and the colors might get darker.
To clean wipe gently with a soft, dry cloth.
Do not clean with abrasive fabrics or any product which is liable to scratch the item as it will remove the patina layer. Avoid exposing items to direct sunlight or a direct source of cold or heat.