RigJuice is a juice that contained random items that Rigby found lying around the house. It appears in the episode "More Smarter". Rigby created it so he can be remembered, but in the episode, he ordered Brain Max juice so he can prove to Mordecai that he is worthy of a high school diploma. In the end of "More Smarter", the RigJuice saved Mordecai and Rigby from being too smart.