A cup (22) includes a base (26) and a wall (30) with an integral straw (36). A lid (24) includes a flange (52) for mating with the cup (22) to establish an assembled position of the drinking assembly (20). The lid (24) defines an orifice (66) aligned with the integral straw (36) in the assembled position, and a flexible straw (68) is disposed within the orifice (66). The flexible straw (68) has a nipple portion (70) extending to an inlet end (72) disposed in abutting relationship with the integral straw (36) in the assembled position to establish a compression fit between the flexible straw (68) and the integral straw (36). The lid (24) is also stackable with identical lids (24) and includes a cavity (60) extending between first and second ends (62, 64). The orifice (66) is disposed about one of the ends (64) and the cavity (60) has an open portion (90) disposed about the other of the ends (62) for receiving a nipple portion (70) of the identical lid (24) being stacked in alternating relationship.