Card Caddy is a cool invention: a $6 snap-lock case that holds your card-game cards securely in your bag, but unsnaps and reconnects to form its own discard pile; a hole in the case lets you tell at a glance which game you have in it.
It came to market after a successful Kickstarter, and is available in four colors. Cases hold a standard playing card deck, 40 sleeved cards or 25 double-sleeved cards. Designer Chris Nicholls has promised future snap-on accessories for more complicated card games.
Card Caddy [Chris Nicholls]