Egg timer or stop watch
Sit in a group and work clockwise or anti clock wise
The game starts with a person giving the person to the right of them a subject. (eg a blade of grass) then the person nominated needs to speak continuously for a nominated time (preferablly 1 minute) about the subject. If the person pauses or fails they drink. the person whom just completed the task then gives the next person a subject of choice and so on.
A twist is the person whom turn it is to give a subject can nominate anyone in the group to speak out of turn, however this will back fire because should the nominated person complete his/her task then the person who nominated him/her has to drink.