Abstract: A cap (30) has an end wall (32) and inner and outer cylindrical walls (34, 36) which are internally threaded. The threads on the inner wall (30) mate with external threads on the neck (38) of a first sized container (40) the threads on the wall (38) are adapted to engage threads on the neck of a second, larger size container (44). A pump (10) is mounted on the cap (30).