Abstract: A stackable compartmentalized drinking cup which is similar to separate cups with joined sides is disclosed. The separate compartments are joined in the top portion of the cup, and are apart at the bottom portion. The side of each cup section facing another cup section may be planar or may be twisted along the length of at least the bottom portion of the cup so that at least part of the cup is spiral. The cups are stackable as the joined sides can fit over and slide down the sides of a similarly constructed cup when so placed so that only the upper portion of the inner cup protrudes from the outer cup. Thermally responsive paints or dyes may further distinguish the compartments.