This LCH-3-2 Cup Holder from Leofoto is designed to attach to their Laptop Deck, creating a convenient and secure place for drinks on set or in the studio. It mounts to the underside of trays via the two included 3/8"-16 screws, and the sliding rail design allows you to mount it in such a way that the cup holder can be concealed underneath the tray when not in use, reducing the overall. Leofoto LCH-3-2 Cup Holder LCH-3-2