A Toby Jug, also sometimes known as a Fillpot (or Philpot), is a pottery jug in the form of a seated person, or the head of a recognizable person. Typically the seated figure is a heavy-set, jovial man holding a mug of beer in one hand and a pipe of tobacco in the other and wearing 18th-century attire: a long coat and a tricorn hat. The tricorn hat forms a pouring spout, often with a removable lid, and a handle is attached at the rear. Jugs depicting just the head and shoulders of a figure are also referred to as Toby jugs, although these should strictly be called "character jugs" or face jugs, the wider historical term.

The original Toby Jug, with a brown salt glaze, was developed and popularised by Staffordshire potters in the 1760s. It is thought to be a development of similar Delft jugs that were produced in the Netherlands. Similar designs were produced by other potteries, first in Staffordshire, then around England, and eventually in other countries. The Jug in the form of a Head, Self-portrait (1899) by Paul Gauguin is an unusual example from a painter. They were made in the 1760s in the Netherlands.