1) Cleaning vessel 2) Old cleaning vessel 
• (n.) A pot or vessel in which anything is washed. • (n.) A pot containing melted tin into which the plates are dipped to be coated.
Wash'pot` noun 1. A pot or vessel in which anything is washed. 2. (Tin-Plate Manuf.) A pot containing melted tin into which the plates are dipped to be coated.