Walk into a traditional Indian kitchen and you'll usually find all three: copper, brass, and bronze. They're often mistaken for interchangeable, but classical Ayurvedic practice assigns each metal a specific role. Here's how to tell them apart and choose the right one.
Copper (Tambra) — For Water
Pure copper is traditionally reserved for storing and drinking water, following the Tamra Jal ritual. It's not typically recommended for cooking acidic foods directly, since copper can react with acids over prolonged contact. Best for: water bottles, carafes, bedside jugs.
Brass (Pital) — For Cooking
Brass is an alloy of copper and zinc, giving it a warmer, more golden tone than copper and a gentler reactivity. It's traditionally used for cooking — kadhais, tea kettles, and ghee pots — often with a thin tin lining (kalai) for direct food contact. Best for: kettles, ghee pots, spice boxes, serving trays.
Bronze / Kansa — For Eating
Bronze, called kansa in this context, is roughly 80% copper and 20% tin. This ratio makes it naturally safe for direct food contact without a lining, which is why it's the metal of choice for thalis, katoris, and dining sets. Best for: everyday dinnerware, festive thalis, serving bowls.
Quick Reference
Storing water overnight? Reach for copper. Cooking a curry or boiling milk for chai? Brass is your traditional pick. Serving the finished meal? Bronze/kansa dinnerware rounds out the ritual. Many households use all three together — a copper bottle by the bed, a brass kettle on the stove, and a kansa thali at the table — each metal doing the job Ayurveda designed it for.
If you're just starting to build an Ayurvedic kitchen, a good entry point is one piece from each category rather than a full set of one metal — that way you experience the full traditional system rather than just one part of it.