Constantin's Puzzle: The Waiter's Tray

This waiter is ready for a break—but first he must remove all the bottles from his tray.

Can you help move the bottles up and down to gradually slide them all out of the tray? Think twice: some bottles need to be moved more than once, and some are locked until you move the balls holding them in place. Upon completion, why not try putting the bottles all back?

Ages 14+