The bottom of the cup screws off and you insert batteries that are not included. Fill with beverage , and when you need it stirred you press the button on the handle and the mini wheel at the bottom spins and stirs. It also comes with a lid that has a drinking hole. Coffee Cocoa tea anything that could useagoodstir is perfect in this cup.nI wish it did not say Self stirring mug in big black letters on it. #Rankboosterreview#Sponsored #GreenGrass https://www.amazon.com/Stirring-Automatic-Mixing-Coffee-Beverage/dp/B071FTHFDB