Shabby old stoneware crock jar chicken waterer, chipped and cracked, with a chipped terracotta flower pot tray for a base.
Strangely, this still works! The cracks to the jar seem tight enough to hold water under the pressure it needs to keep the water in the pan from overflowing.
The jar doesn't seem to be marked with a maker. It measures 8" in diameter across the rim and stands about 9 1/2" tall.