A device for dispensing foam from a source of foam, the device comprising: (a) a foam inlet arranged for communication with a source of foam; (b) a foam pathway in fluid communication with the foam inlet and comprising a foam outlet, arranged for engagement by a syringe nozzle of a syringe; and (c) a waste outlet in fluid communication with the foam pathway, wherein the foam pathway comprises a tubular projection arranged to extend through the foam outlet and into the syringe nozzle when the syringe is connected to the foam outlet, wherein the foam pathway is configured such that a sufficient clearance is provided between a circumferential edge of the tubular projection and an internal edge of an aperture of the syringe nozzle to allow displacement of material therebetween, and wherein either the tubular projection of the foam pathway is connected to the foam inlet to establish the fluid communication between the foam pathway and the foam inlet and thus to allow delivery of foam from the foam inlet through the tubular projection into the syringe nozzle, or the tubular projection of the foam pathway is connected to the waste outlet to establish the fluid communication between the foam pathway and the waste outlet and thus to allow displacement of contents of the syringe nozzle through the tubular projection into the waste outlet, and wherein the device further comprises a means for controllably restricting displacement of material through the waste outlet, the means for controllably restricting displacement of material through the waste outlet being a pressure-valve that opens in response to increased pressure in the foam pathway and closes when that pressure decreases. (a) a foam inlet arranged for communication with a source of foam; (b) a foam pathway in fluid communication with the foam inlet and comprising a foam outlet, arranged for engagement by a syringe nozzle of a syringe; and (c) a waste outlet in fluid communication with the foam pathway, wherein the foam pathway comprises a tubular projection arranged to extend through the foam outlet and into the syringe nozzle when the syringe is connected to the foam outlet, wherein the foam pathway is configured such that a sufficient clearance is provided between a circumferential edge of the tubular projection and an internal edge of an aperture of the syringe nozzle to allow displacement of material therebetween, and wherein either the tubular projection of the foam pathway is connected to the foam inlet to establish the fluid communication between the foam pathway and the foam inlet and thus to allow delivery of foam from the foam inlet through the tubular projection into the syringe nozzle, or the tubular projection of the foam pathway is connected to the waste outlet to establish the fluid communication between the foam pathway and the waste outlet and thus to allow displacement of contents of the syringe nozzle through the tubular projection into the waste outlet, and wherein the device further comprises a means for controllably restricting displacement of material through the waste outlet, the means for controllably restricting displacement of material through the waste outlet being a pressure-valve that opens in response to increased pressure in the foam pathway and closes when that pressure decreases. wherein the foam pathway comprises a tubular projection arranged to extend through the foam outlet and into the syringe nozzle when the syringe is connected to the foam outlet, wherein the foam pathway is configured such that a sufficient clearance is provided between a circumferential edge of the tubular projection and an internal edge of an aperture of the syringe nozzle to allow displacement of material therebetween, and wherein either the tubular projection of the foam pathway is connected to the foam inlet to establish the fluid communication between the foam pathway and the foam inlet and thus to allow delivery of foam from the foam inlet through the tubular projection into the syringe nozzle, or the tubular projection of the foam pathway is connected to the waste outlet to establish the fluid communication between the foam pathway and the waste outlet and thus to allow displacement of contents of the syringe nozzle through the tubular projection into the waste outlet, and either the tubular projection of the foam pathway is connected to the foam inlet to establish the fluid communication between the foam pathway and the foam inlet and thus to allow delivery of foam from the foam inlet through the tubular projection into the syringe nozzle, or the tubular projection of the foam pathway is connected to the waste outlet to establish the fluid communication between the foam pathway and the waste outlet and thus to allow displacement of contents of the syringe nozzle through the tubular projection into the waste outlet, and wherein the device further comprises a means for controllably restricting displacement of material through the waste outlet, the means for controllably restricting displacement of material through the waste outlet being a pressure-valve that opens in response to increased pressure in the foam pathway and closes when that pressure decreases.