7 Wonders Insert: - Rules of Play says:
Insert compatible with 7 Wonders 1st Edition®, and has space for the Babel®, Wonder Pack®, Cities®, and Leaders® expansions. The design provides both efficient storage and improved game play. The trays can be utilised during the game, and they greatly aid set-up and clear-away times. The rules and boards act as a lid on top of the trays.