Make a lung
Take a 2L bottle. Cut it in half.
Put tape around the bottom so its not sharp
take a bread bag. tape it to the bottom of the bottle.
tape the bottom of the bag so its easier to pull the bag.
take the pop cap. drill a hole or carve one. be careful of your fingers.
take a smaller clean socket. not too small. like a 6 or 7 mm socket.
hot glue the socket in the hole of the cap. put a screen in there.
or if you dont have one. use tin foil. i know it tastes like sh!t but still.
If your a regular toker like me @ 9-10 joints a day usually.
Take a piece no bigger then .1 break it in half. theres 2 lungs.
Try it out. i do it all the time. I own glass pipes but i would rather do lungs.
Us Nova Scotians like it better that way