recycle

Hey all, Im new to pen making and Im gathering information for making a fountain pen from scratch nib and all. I have a plan roughed out for making a vacuum barreled fountain. I plan on recycling a bowling ball for the feed and using tubing for just about everything else. Im a student at UWM so...

Okay I know recyle code 5 cups work with pr but I remember another post saying you could use two other codes but I cannot find that post anymore. So if someone knows can they please post. Thanks in advance.