One bottle, one shaker, rolling it down your arm, the armroll.
Execution:
Start by throwing the bottle behind your back. After that throw around the shaker and the bottle. Than bring the bottle around your head and on your shoulder. Roll it down your arm with the bottleneck in the shaker. At the end of your arm hold the bottle neck tight, swing it around a little and start filling the shaker.
Tips:
Make sure you practice with one bottle or shaker first.