The Copper Chest is a storage block crafted using 8 Copper Ingots surrounding a Chest in a 3×3 crafting grid. It functions similarly to a regular Chest but features unique oxidation behavior, gradually changing color through four stages — Unoxidized, Exposed, Weathered, and Oxidized. Players can prevent oxidation by applying Honeycomb to create a Waxed Copper Chest. Copper Chests naturally appear when creating Copper Golems, matching the oxidation level of the copper block used.

A Copper Chest can store 27 item stacks, while placing two side by side creates a Large Copper Chest with 54 slots. It can be opened unless obstructed by a conductive block and can be renamed or locked using commands. Over time, oxidation alters its appearance but not its function. Copper Golems can interact with the Copper Chest by taking items from it and storing them in nearby wooden Chests, making it useful for automated storage setups. Axes remove oxidation, and the chest must be mined with a stone pickaxe or better to drop itself.