These Traveler’s Notebook PVC Zippered cases add catch-all functionality to your Traveler’s Notebook. One end of the refill has a zippered pouch for storing tickets, receipts, keys, and coins. (I use it to hold stamps, paper clips, and a few Book Darts. The other end has a pocket for stashing photos, post cards, papers, and more. The transparent plastic makes it easy to see what is inside.