Brain and Nerve Tonic (File:Brain and Nerve Tonic Icon.png) was a limited time currency during the Tap Ball 2015 Event. A three bottles' pack of Brain and Nerve Tonics was rewarded five times during the event: * 3rd Daily Training's Task, * 11th Daily Training's Task, * 17th Daily Training's Task, * 21st Daily Training's Task, * 26th Daily Training's Task. A nine bottles' pack of Brain and Nerve Tonics was also rewarded completing: * 4th Personal Prize of the third Act. The player could also purchase Brain and Nerve Tonic for 5 donuts each when playing Tap Ball.