When the top contents of multiple Bubbles (before adding alcohol) is poured into a cup then mixed with any desired amount of alcohol. This is done in attempt to not waste any mixers while consuming alcohol.
At a party where more than one Bubble is being consumed this method is most commonly found to conserve mixers.
see Bubble .
"I have nothing to drink, can i have the cubble?"
"Oh no! This cubble has too manydifferent sodas in it....it'll taste worse than our kings cup!"