Dispenser

A measurable dispenser, comprising

• a first vessel for containing a substance to be dispensed,
• a second, measurable, vessel, removably mounted on the first vessel,
• a one-way valve whereby fluid from the first vessel can be caused to move into the second vessel and retained therein virtue of the one-way valve, and wherein the second vessel is provided with one or more indicia indicating measured amounts, and;
• a child-proof locking mechanism, comprising a bayonet ring adapted to be mounted relative to the first vessel in such a way it can surround part of the vessel, be freely rotatable relative thereto in either direction but be retained thereon, the bayonet ring having at least one bayonet channel extending from an open, proximal, top surface of the bayonet ring to a closed distal end and having a cavity portion at or towards the closed distal end, and a resiliently deflectable tongue extending into the cavity and having an angled surface at its free end, wherein the bayonet ring comprises an inner ring and an outer ring joined by a common circular base, and the bayonet channel is provided on the inner ring;
• wherein the second vessel is provided with a part of the child-proof locking mechanism having on its outer surface at least one bayonet follower projection;
• and
• wherein, with the bayonet ring secured in place relative to the first vessel, by holding the bayonet ring and the first vessel stationary relative to one another, the second vessel can be rotated relative thereto such that the bayonet follower projection moves within the bayonet channel to deflect the free end of the deflectable tongue and then be retained within the cavity, to retain the second vessel relative to the bayonet ring.