I'm using these http://www.ebay.com/itm/262062018808 for quite a while (got the second one in 5 years, as their locking mechanism goes bad eventually). Great for chip cards, as it works as a Faraday cage for them. Fits some bills as well. All the change I'm carrying is 4 quarters, just for a coin phone, I guess, along with 5x$20s in a secret emergency stash.
(you may want to search there for the model with ribs on one side, it's sturdier)
WARNING & DISCLAIMER:
SELECT AND USE OUTDOORS AND SURVIVAL EQUIPMENT, SUPPLIES AND TECHNIQUES AT YOUR OWN RISK. Information posted
on this forum is not reviewed for accuracy and may not be reliable, use at your own risk. Please
review the full WARNING & DISCLAIMER about information on this
site.