Bangjja (방짜) is Korean bronzeware made the hard way: an alloy of copper and tin, heated and hammered, folded and hammered again - thousands of strikes - until the metal is dense enough to ring. Cast brass clinks; bangjja sings.
Koreans have eaten from it for a thousand years for reasons that turn out to be scientific: the alloy is naturally antibacterial, keeps soup hot and water cold, and famously discolors in contact with certain toxins - royal courts used it as a food taster.
What to buy first: a pair of soju cups (the ring when you toast is the whole point), a spoon-and-chopstick set, or a single bowl you will use daily. Look for hammer marks - faint, irregular facets across the surface. Perfectly smooth means cast, not forged.
We carry hand-forged bangjja from Notdam and Myungsung Yugi - cups, cutlery, full dinnerware sets - in Hidden Korea and The Market. The lifetime pieces are in Heritage Select.