A cup holder assembly includes a door configured for translation between an open and a closed configuration, at least one receiver sidewall, and at least one first cup holder surface provided by a bottom surface of the door and configured to upwardly extend at least a portion of the receiver sidewall when the door is disposed in an open configuration. A retention system for a container is provided, including at least one container biasing member and at least one container supporting member. The container biasing member may be door-mounted or receiver sidewall-mounted.