packing box; shipping box
A box used for packing, shipping, or storing items; often a cardboard box or crate.
I bought a lot of packing boxes for the move.
This packing box is sturdy and can hold heavy books without a problem.
Compound of 梱包 (こんぽう, 'packing') and 箱 (はこ, 'box'). The reading はこ becomes ばこ due to rendaku.