Found a few tins that may or may not be new for PSK's. I just recently saw an Altoids tin with a slide top. It is very thin and may not hold much but it would hold it securely and would be so small that you WOULD carry it every day.

The other one was of the same type of slide top (both slid off of one end) and I saw it at Walmart by the register. It was a gift card 'case' for you to put the gift card into. It kind of made it look like a wrapped gift....they had many different styles....all decorated and all had a 'hoder' for the card. If you took the holder out then you would have a lot more room than if you left it in. Also a carry every day since it is so compact.