This item is a Portuguese Cataplana, a traditional clam-shaped vessel used for steaming seafood, stews, and rice dishes. Material: Features a hand-hammered copper exterior for superior heat distribution and a non-reactive tin-lined interior to prevent food from reacting with the copper. Design: A unique hinged clamshell design with secure locking latches on either side. This seals tightly to trap steam, locking in intense moisture and flavor while cooking. Versatility: Ideal for preparing traditional dishes like Amêijoas na Cataplana (clams), mussels, bouillabaisse, or curries. Authenticity: Often handmade by artisans in Portugal using centuries-old techniques.