I collect postcards and I really enjoy www.postcrossing.com I put all my cards in a photobox, sorted by country, but I wanted to find something I could put them in that was visible for a while. I also love the secondhand store. :) I came across this somewhat older gum display and thought "hmm.. I wonder if that is the right size for postcards??" It's great for regular sized cards! and it reminds me of all the Juicy Fruit and Spearmint gum I bought when I was younger. I didn't like Big Red or Winterfresh but Doublemint was good in a pinch.