looking for a certain pipe

I was over at a friends house and saw the coolest pipe ive seen in a while. It sorta looks like a chillum, but not. It's a straight pipe with the bowl on the top and the mouth piece is a small hole on the bottom where you had to cover it and make a small hole with your hand and smoke through your hand. Does anyone know what their called and where i can find one? My friend called it a knuckler.

 

That's a chillum.

 

Indeed

 

if the tube is hollow straight through with holes on both ends that would be a steam roller