Used a nav bag like the one pictured above from Ambitious. It's still around somewhere. I gave up on it. Available cockpit space always seemed to be a few centimetres less than the dimensions of the bag and I was inclined to put more into the bag than I actually needed. The corners and edges caught and frayed. The only thing it was good for was taking all my study books to groundschool and flight training. I'm in full support of the Coles' bag. These days, I often take my laptop and I like the backpacks with padded laptop space and cell phone pocket. Fits all the things I need, tucks into the smallest spaces, is easy to carry, cheap enough and is very convenient. To each his own.
Folding Grocery Cart<br> - Assorted Colors
US$10.99