Most snap-lock bottoms are not flat packed in the manner UX BOXES does. The ends are exposed and the end user (factory workers, etc.) have to figure out how to configure the box themselves. Notice how the open-hole window allows the user to release the pre-folded snap-lock bottom. For non-window boxes, the user will have to insert their product to fully connect and push out the snap-lock bottom in place. Auto-lock bottoms are much easier to assemble as they are glued and perforated in a way that can be folded and re-folded.