I have found that I really like setting my Side Effect down into the main compartment of my Medium Cafe Bag. It fits perfectly and has the effect (pun intended!) of adding more organizational capability to the Cafe. Most of the time, I leave the Side Effect main zipper open so I have easy access to its pockets. I can put larger items that I don't use a lot underneath the Side Effect. If necessary, I can quickly zip and yank the Side Effect out and run with my bare essentials, leaving the Cafe bag in the car/at home.