A large cup and small cup are provided which are attachable together. With an upright attachment the large cup nests within a reservoir of the small cup. With an inverted attachment, the small cup has a base which can friction fit against a lower end of the large cup. The small cup includes structures such as a skirt and shelf which can exhibit a friction fit with a foot on the lower end of the large cup to facilitate the inverted attachment of the small cup to the large cup. A recess in the base of the small cup exhibits a friction fit with the foot to facilitate upright attachment when the large cup is nested into the small cup. In an alternative embodiment a fastener is provided including posts and slots in the small cup and large cup to couple the cups together when nested together.