Mid-board holds for levels 21 to 40

Levels 21 to 40 add a locked bottle. Clear the color that is blocking the lock before you shuffle the rest. Keep the empty bottle for the locked color only. If an interstitial appears, wait until the pour animation has finished. Coming back should show the same board. Do not buy the extra slot. The tested path does not need it. This was checked on version 1.4.2 after the community draft was edited for length and to remove a nickname that looked like an email address.