A device for packaging and dispensing a flowable product, comprising:
- a casing comprising a nozzle for dispensing the product and a container designed to contain the product to be packaged, the casing comprising a rigid bottom;
- an air renewal and filtration assembly for air entering the container after a dose of product had been dispensed;
- a filter element for filtering air entering the container;
- an air inlet passage located in said rigid bottom, the rigid bottom comprising an interior surface facing the inside of the container and covered by said filter element;
- wherein said nozzle extends around a central axis and comprises:
- a tapered portion that defines a free end of the nozzle;
- an actuating portion resiliently movable between an engagement position and a rest position, said actuating portion being axially shifted with respect to the free end;
- an outer contact surface defined by the actuating portion, and when pressure is applied to the actuating portion at the outer contact surface by a user, the actuating portion is capable of expelling product;
- a displaceable inner surface that follows movement of the actuating portion;
- a first valve to allow the product to pass out through the free end when pressure is applied to said actuating portion without allowing external air to enter said casing through the free end when said actuating portion is released;
- wherein said device further comprises:
- a second valve arranged in such a way as to isolate a dose-defining chamber from the air contained in the container, the dose-defining chamber having a determined volume in the rest position of the actuating portion;
- a rigid stopper element provided with an abutment surface that defines with said displaceable inner surface the dose-defining chamber, said engagement position being obtained by engaging the actuating portion of the nozzle against the abutment surface of the rigid stopper element;
- and
- wherein the displaceable inner surface is in contact with and entirely covers the abutment surface in said engagement position of the actuating portion, so that the dose of product dispensed when moving the actuating portion from the rest position to the engagement position corresponds to the determined volume of the dose-defining chamber.