I "modded" (actually just "accessorized") my WBBB so it would be easier to open and close the food-end zipper.
I hate trying to get in / out while trying not to harm the zipper... This makes life easy (works well for me - you may be fine without (YMMV))
EDIT: Just realized the video is wayy out of sync with the Audio... Bummer :-) Looks like the audio is normal but video is playing 1/2 speed. You get the idea though.