A cup holder sidewall includes a recess adapted to receive at least part of a handle having upper and lower socket engaging portions received in sockets in upper and lower flanges defining the recesses. The socket engaging portions permit the handle to be displaced from the sidewall recesses to a position projecting outward from the sidewall to permit the handle to be grasped in one hand. The sidewall includes at least one flexible segment extending through the sidewall from the inner surface to the outer surface, which may also extend from the upper margin to the lower margin. Each flexible segment renders the sidewall sufficiently flexible to allow the sidewall to adjust to receive cups of varying sizes and shapes.