The project is a simple open pouch, quite like the kind you put sunglasses in. First, I had to cut the cardboard to the size and shape I wanted. Then I used the glue to glue it to the fabric.
Cost of holder, not including scissors and glue = $2 from Daiso. The cardboard was the piece used in the packaging. Long live Daiso. :p
BTW I didn't think of this myself, but got inspiration from a tutorial at the instructables website. You can go there and search for all kinds of tutorials.