chilliums pipes are conical pipe with end-to-end channel with a bowl face front, not face top, and they are an age old tool used traditionally for spiritual smoking sessions. most time the chillum pipe made from stone, according to studies people staring using chillim pipe since mid-1960 and it was spread to the world  from India, most people confuse with chillum pipe and Bat, Bat mostly fits dugout and use it with dugout together, and Chillum are made from stone or glass,do not need a dugout to use