Here we used ink-dyed paper from the previous post, but you can use any pretty paper.
The paper is wrapped around a soft-cover book as a form. You could use other solid rectangular shapes like milk cartons or small boxes.
The back overlap seam and the folded base of the packet are glued in position with wood glue. You may want to punch holes in the top and thread some ribbon through.
Make a few to keep on hand.