In the past I designed and posted the Functional Papercraft: Folded Box, this project in that same vein. This box is perfect for carrying stuff with it’s built in handle, which is surprisingly strong. It also makes a good gift box.
This copy of the container is cut from a 8x8in of paper area, and when folded is 2x2x4, big enough for small trinkets. The design can easily be scaled up to hold bigger items, all you would have to do is printing out the design larger.
Check out the projects page for more details and downloadable files on the Takeout Box.