Third lung

a device used to smoke marijuana constructed by the following steps: 1. cutting off the bottom 5th of a 2 liter pop bottle. 2. line the inside of the bottle with a plastic bag and tape it to the outside of the bottle creating an air tight seal about 2 inches from the bottom of the bottle. 3. drill a hole in the cap and insert a small bowl peice(also make edge air tight; suggested to use thread seal tape) 4.fill the bowl, and light it while pulling the bag out from the bottom (thus filling the bag with smoke) 5 un-screw the cap and enjoy