Caster

n.
  1. One who casts; as, caster of stones, etc. ; a caster of cannon; a caster of accounts.
  2. A vial, cruet, or other small vessel, used to contain condiments at the table; as, a set of casters.
  3. A stand to hold a set of cruets.
  4. A small wheel on a swivel, on which furniture is supported and moved.