From The Collaborative International Dictionary of English v.0.48 [gcide]:
Porringer \Por"rin*ger\, n. [OE. pottanger, for pottager; cf. F.
potager a soup basin. See Porridge.]
A porridge dish; esp., a bowl or cup from which children eat
or are fed; as, a silver porringer. --Wordsworth.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
porringer
n 1: a shallow metal bowl (usually with a handle); "the child
was eating pottage from a porringer"