carboy n 1: a large bottle for holding corrosive liquids; usually cushioned in a special container
Carboy \Car"boy\ (k[aum]r"boi), n. [Cf. Ir. & Gael carb basket; or Pers qur[=a]bah a sort of bottle.] A large, globular glass bottle, esp. one of green glass, inclosed in basket work or in a box, for protection; -- used commonly for carrying corrosive liquids; as sulphuric acid, etc. [1913 Webster]