Mounting cup for pressurized container

1. A valve for dispensing flowable product from a container body under pressure, the valve comprising:

a stem including a stem body defining a passage therein, and a disc at a lower portion of the stem body;

a seal coupled to the stem body, the seal including a seat sealingly engaging the disc of the stem when the valve is closed, a neck extending from the seat and surrounding at least a longitudinal portion of the stem body; and

a mounting cup configured to mount the valve to the container, the mounting cup including a base and a sidewall extending from the base, wherein the base defines an opening through which the stem and the seal extend such that the sidewall of the mounting cup surrounds at least respective longitudinal portions of the stem body and the neck of the seal,

wherein the stem consists essentially of polypropylene (PP) having a density less than water,

wherein the seal consists essentially of a thermoplastic elastomer (TPE) having a density less than water,

wherein the mounting cup consists essentially of polyethylene terephthalate (PET) having a density less than water.

2. The valve set forth in claim 1 in combination with the container body, wherein the valve is secured to the container, wherein the container body comprises polyethylene terephthalate (PET).

3. The valve set forth in claim 1 , wherein the valve is free from metal.

4. The valve set forth in claim 1 , wherein the valve is free of a gasket that forms a seal between a lip of the container body and the mounting cup.

5. A pressurized container comprising:

a container body including a lip at one end thereof; and

a valve configured to dispensing flowable product from the container body under pressure, the valve comprising:

a stem including a stem body defining a passage therein, and a disc at a lower portion of the stem body;

a seal coupled to the stem body, the seal including a seat sealingly engaging the disc of the stem when the valve is closed, a neck extending from the seat and surrounding at least a longitudinal portion of the stem body;

a mounting cup coupled to the lip of the container body to mount the valve on the container body, the mounting cup including a base and a sidewall extending from the base, wherein the base defines an opening through which the stem and the seal extend such that the sidewall of the mounting cup surrounds at least respective longitudinal portions of the stem body and the neck of the seal,

wherein the stem consists essentially of polypropylene (PP) or a material having a density less than water,

wherein the seal consists essentially of a thermoplastic elastomer (TPE) having a density less than water or another material having a density less than water,

wherein the mounting cup consists essentially of polyethylene terephthalate (PET) or a material having a density less than water; and

a flowable product contained under pressure in the container body, wherein an annular inner wall of the mounting cup is deformed under pressure and engages an interior surface of the container body defining the opening to form a leak proof seal between the mounting cup and the container.

6. The pressurized container set forth in claim 5 , wherein the container is free of a separate gasket forming a seal between the lip of the container body and the mounting cup.

7. The pressurized container set forth in claim 5 , wherein the container consists essentially of plastic.

8. The pressurized container set forth in claim 7 , wherein the container comprises polyethylene terephthalate (PET).

9. The pressurized container set forth in claim 5 , wherein the valve is free from metal.

10. The pressurized container set forth in claim 5 , wherein the stem is biased to an open position under the force of gravity when an upward pressure applied to the disc of the stem is at or below a predetermined threshold pressure.