Here are the materials
Cut the bag apart
Remove all parts of the bag leaving one large side (logo side) and one small side (width of the bag)
Turn bag vertically. Flip bag over so the side you want to be the inside of the pouch is facing up. Then fold bottom portion in half and top (the original bag side piece) over.
Using an awl, seam ripper or other sharp object, make 10 holes along each non-folded side of the pouch.
Thread the tapestry needle
Begin sewing from the top and pull ribbon all the way through leaving enough ribbon to tie a knot.
Tie a knot
Continue sewing by always putting needle in from the top
Do this until you reach the 10th hole
Here's one side
Now pierce only the top layer of paper. Thread ribbon through.
Tie a knot.
Fold down the top of pouch and use your finger to measure where the knot on the side is. Your will need to make a hole here.
Thread ribbon through this hole
Tie another knot at the end of the ribbon.
Repeat steps 6-16 on the other side.
To close the pouch simply pull ribbons down and tuck under one loop on each side.