This has to do with something: Photo-related Review 2
Fuji 120 Film Holders



If you shoot Medium Format, these Fuji made 120 film cases are worth picking up. Instead of messing with a bunch of little cardboard boxes all you have to do is pop open a plastic case and get out the next roll of film. Shooting with a Pentax 67 means you do this every 10 pictures. Fuji also makes similar cases for 35mm film but I’d imagine that the rolls would rattle in the cases as you walk. This is not a problem with the 120 cases since the wrapper holds everything snug. Overall this is the kind of product that is perfect at what it does, even if that purpose is as mundane as holding rolls of film. There is not anything you can do to perfect this, unless they came in titanium or whatever.
120 Film cases come in packs of 2 for about 700 yen at Yodobashi Camera.