Waxed Oxidized Copper Chest is the fourth and final oxidation stage of the copper chest, sealed with honeycomb: a teal storage block with green spots and 27 item slots. Oxidation (the discoloration of copper over time) moves a copper chest through four stages, and using a honeycomb on a copper chest prevents this weathering. Waxed Oxidized Copper Chest is crafted by combining an Oxidized Copper Chest with a honeycomb in the crafting grid, while the base Copper Chest takes 8 copper ingots arranged around a single chest. Mining Waxed Oxidized Copper Chest with anything weaker than a stone pickaxe drops only the stored contents.
As a container, Waxed Oxidized Copper Chest holds 27 slots, and two copper chests placed side by side merge into a large chest with 54 slots. A mixed pair keeps the oxidation level of the least oxidized half and turns unwaxed whenever either half is unwaxed, so pairing with a plain Copper Chest sacrifices the teal tone. Copper golems unload copper chests into nearby wooden chests: one golem visits up to 10 copper chests and takes up to 16 of the first item, searching 32 blocks horizontally and 8 vertically. Piglins turn hostile toward players who open or break a copper chest. Builders pick the teal, green-spotted finish of Waxed Oxidized Copper Chest for aged-copper architecture.