Gamegenic Catan Trading Post - Rules of Play says:

The all-in-one-solution to carry, organize, and hold your CATAN® cards during the game. The Trading Post works perfectly as a card holder with 6 card compartments that accommodate sleeved cards. The upper level can be seamlessly slid backward to allow free access to all cards. Small notches at the bottom provide convenient access even to the last card. The compartments are designed to hold all cards of the CATAN® base game and CATAN® 5-6 Player Extension. The cover of the Trading Post is fully removable and can be easily converted into a rigid dice tray. It is made from premium materials such as Nexofyber and soft inner microfiber lining. This protects the stored cards and provides a smooth sound for dice rolling. Strong magnets will keep this box safely closed, even when it is full.