This is “JOINT LESS COPPER MATKA/POT”. It is hand made from single sheet of copper plate. It is not welded and hence it has not impurities added. Its leak proof having no joints. There are very few sellers who sells Jointless copper matka, so you have made right choice. Our Copper pot is not welded. It has no joints. This is pure copper pot and is polished and we have applied anti rust spray on it. Copper by nature reacts with air, humidity, and water hence the care is needed. Copper matka may have spots on it, that’s natural reaction, not an issue with product, its copper’s purity which reacts. You do not need to brush or use detergent to wash this pot from outside. Also, you can wash the pot with Lemon juice and Salt mixture from inside. Before using first time, you should wash the pot from inside thoroughly. You can wash it with Lemon juice + Salt mixture in water. Outside surface will remain same for long if you do not use brush, hard cloths, detergent etc.