These events can be held at WCA competitions (unofficially), unofficial competitions, and speedcuber meetups. They tend to be less competitive than the events in the Unofficial category.
Solve a 3x3x3 blindfolded and drink a 230-340ml bottle of non-alcoholic liquid. The competitor must drink the liquid strictly after the memorization phase (after donning the blindfold) and before the execution phase. The bottle must remain closed until the competitor has donned their blindfold. Penalty: DNF. The liquid must not be spilled. Penalty: DNF.