At the Container Store we were looking to find interesting mechanisms that will allow us to get the fixtures that will be stored in the bike as small as possible, leaving room available for cargo. The Elfa system is really intriguing, an elfa track could be attached to the outside edge of the bike, allowing for all different fixtures and attachments possibilities. The collapsible crate was was also great for what we are looking for, it folds completely flat and is super rigid once open.