I don't have a Burn anymore, but if I remember, it seemed like the pattern would be something similar to this:
I don't remember what height the pieces below the bottle pockets were. If they were set higher than the bottom of the front panel side, you would increase the width of the two side flaps in the pattern.
I only had a Burn briefly, so I don't know if any of this is entirely correct. I do think it's similar though.