A blowgun.

A long wrought iron tube, on the end of which the workman gathers a quantity of "metal" (melted glass), and through which he blows to expand or shape it; -- called also blowing tube, and blowpipe.

a tube that directs air or gas into a flame to concentrate heat

a tube through which darts can be shot by blowing

A similar instrument, commonly of tin, used by boys for discharging paper wads and other light missiles.