A dosing apparatus suitable for dispensing a dose of liquid from a resilient squeezable container, comprising: a cap, suitable for attachment to said container, said cap comprising an expulsion channel for the expulsion of liquid; a cylindrical dosage chamber attached to said cap, said dosage chamber comprising side walls extending from said cap, at least one inlet opening in said side walls proximal to said cap: a pressure chamber located underneath said dosage chamber; a valve provided at the end of the pressure chamber distal to said dosage chamber, said valve being moveable from an open position, allowing liquid to flow through one or more discharge openings, and a dosed position where the valve closes the or each discharge opening, said valve incorporating at least one aperture; and a plunger provided in said dosage chamber, and moveable relative to said dosage chamber so as to advance upon squeezing of said container, up to a blocking position, wherein said pressure chamber 17) has a smaller diameter than said dosage chamber in order to form a flange above the pressure chamber for said plunger to rest against, wherein said valve incorporates a disc attached to said pressure chamber by one or more retaining means, wherein said retaining means incorporate one or more tines which extend against the inner surface of said pressure chamber, characterized in that the pressure chamber is cylindrical and in that said tines incorporate a hook and said pressure chamber incorporates a lower ledge at least partially extending around the inner diameter of said chamber in order to retain said tines when said valve is, in use, in an open position, the one or more discharge openings being defined in the open position between the ridge, circumference of the disc and tines and; wherein said disc has an upper surface which abuts, in use, against the distal extremity of said pressure chamber, closing the discharge openings when in the dosed position; and wherein said disc has a diameter greater than the external diameter of said pressure chamber. a cap, suitable for attachment to said container, said cap comprising an expulsion channel for the expulsion of liquid; a cylindrical dosage chamber attached to said cap, said dosage chamber comprising side walls extending from said cap, at least one inlet opening in said side walls proximal to said cap: a pressure chamber located underneath said dosage chamber; a valve provided at the end of the pressure chamber distal to said dosage chamber, said valve being moveable from an open position, allowing liquid to flow through one or more discharge openings, and a dosed position where the valve closes the or each discharge opening, said valve incorporating at least one aperture; and a plunger provided in said dosage chamber, and moveable relative to said dosage chamber so as to advance upon squeezing of said container, up to a blocking position, wherein said pressure chamber 17) has a smaller diameter than said dosage chamber in order to form a flange above the pressure chamber for said plunger to rest against, a pressure chamber located underneath said dosage chamber; a valve provided at the end of the pressure chamber distal to said dosage chamber, said valve being moveable from an open position, allowing liquid to flow through one or more discharge openings, and a dosed position where the valve closes the or each discharge opening, said valve incorporating at least one aperture; and a plunger provided in said dosage chamber, and moveable relative to said dosage chamber so as to advance upon squeezing of said container, up to a blocking position, wherein said pressure chamber 17) has a smaller diameter than said dosage chamber in order to form a flange above the pressure chamber for said plunger to rest against, wherein said valve incorporates a disc attached to said pressure chamber by one or more retaining means, wherein said retaining means incorporate one or more tines which extend against the inner surface of said pressure chamber, characterized in that the pressure chamber is cylindrical and in that said tines incorporate a hook and said pressure chamber incorporates a lower ledge at least partially extending around the inner diameter of said chamber in order to retain said tines when said valve is, in use, in an open position, the one or more discharge openings being defined in the open position between the ridge, circumference of the disc and tines and; wherein said disc has an upper surface which abuts, in use, against the distal extremity of said pressure chamber, closing the discharge openings when in the dosed position; and wherein said disc has a diameter greater than the external diameter of said pressure chamber.