ditty bag

Suggested to be a clipping of commodity bag, a British naval term.

ditty bag (plural ditty bags)

1. A small bag used to carry one's personal effects or toiletries while traveling.
2. A sailor's small bag to hold thread, needles, tape, etc.; a housewife.

   Synonym: sailor's housewife

3. A Girl Guide's bag to hold dishes and cutlery, usually made of mesh fabric or sewn dishtowel.

   Synonyms: mess bag, dilly bag, mess kit

4. (theater) A bag used to hold costume pieces that do not hang on hangers, such as socks or gloves.