Wiktionary
ditty box
n. A small box to hold a sailor's thread, needles, comb, etc.
Usage examples of "ditty box".
Here he sits on his ditty box, the grand high mucky-muck of Lend-Lease, never gets a look-see at what's really happening and here you come along, and go might out and get the dope.
He kept them all locked up in a tin box he called his ditty box, not very big.