Abstract: A dispenser comprises a container having a first aperture therein and a first closure element for sealingly closing the first aperture wherein the container has a second aperture and a second closure element for closing said second aperture, the second closure element including a pressing element operable to press inwardly towards the second aperture, a blister pack, locating element locating the blister pack to span across the second aperture and sealing element sufficient to ensure the second aperture is sealingly closable against leakage of the intended contents of the dispenser. The construction and arrangement is such that in end use the container holds a first substance and the blister pack holds a second substance and when the pressing element is pushed the blister pack is ruptured enabling the mixing of the contents thereof with those of the container.