Summary Problem: Carrying a bunch of little things that need to be organized on my bike. Solution: Make something needlessly complicated and time consuming that does, basically, the same thing as a backpack and sandwich bags. Introducing the PT Bike Box! I have the rack that goes with Topeak BabySeat 2. So, in addition to those fine qualities listed above, it's also very specific. However, it does work great and holds a lot of stuff (see pics). I'm sure there's tons of improvements that could be made. Let me know if you think of any. Instructions The black boxes were printed at .2 layer height and 50% infill. I used a marine grade epoxy to glue one of the bike box bases to one of the bike boxes. Also, I glued a no logo lid to a logo lid to make a tray for the second bike box on top. The green bit and red bits were printed at .2 layer height with 10% infill.