Why do I build my own stuff? One: Because I'm cheap. Two: I like things that are handmade opposed to high dollar CNC parts (I don't even own a plasma cutter). To me, it just gives the parts some character and opens up ideas instead of being locked into one particular design. The following photos show how to create your own 'bag cups using a grinder, a drill, and a welder—that's it. Oh, and the process takes just over an hour, and you probably already have enough materials lying around the garage to get started TODAY! Enjoy :).