damp box

noun Ceramics.

a box that is lined with moist material for keeping clay in a plastic state.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for damp box

Historical Examples of damp box

All work to be stuck up or modelled on should be kept in the damp-box until quite finished and then dried very gradually.
Pottery, for Artists Craftsmen & Teachers
George J. Cox
Various other expedients for drying cupboards, damp-box, etc., will suggest themselves as the course develops.
Pottery, for Artists Craftsmen & Teachers
George J. Cox