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.