From Longman Dictionary of Contemporary Englishstoupstoup /stuːp/ noun [countable] RRCa container for holy water near the entrance to a church
Examples from the Corpus
stoup• A young boy with a ladle and a stoup of water wetted their grizzled mouths.• The gaoler returned and left a stoup of water.• In place of the holy water stoup, a baptismal vessel is held above his head by John.Origin stoup (1300-1400) Old Norse staup “cup” 