Plastic container

1. A plastic container which comprises:

a hollow body of plastic material having a lower supporting base portion, a sidewall portion extending upwardly from the base portion, a neck portion extending upwardly from the sidewall portion, and an opening at the top of the neck portion;

wherein the neck portion has an upper screw threaded outer surface for holding a screw threaded closure, a tamper bead beneath the screw threaded outer surface having a top and bottom portion thereof, and a support ring beneath the tamper bead having a top and bottom portion thereof; and

wherein the weight of the neck portion is from 2.5 to 4.4 grams, the opening at the top of the neck portion is round and from 25 to 30 mm wide, the ratio of center of gravity to container height is from 0.4999 to 0.425, and wherein said container is for holding carbonated beverages.

2. A plastic container according to claim 1, wherein the distance from the top of the neck portion to the bottom of the tamper bead is from 0.310 inch to 0.525 inch.

3. A plastic container according to claim 2, wherein the distance from the bottom of the tamper bead to the bottom of the support ring is from 0.250 inch to 0.125 inch.

4. A plastic container according to claim 3, wherein said container includes a shoulder portion extending upwardly and inwardly from the side wall portion to the neck portion.

5. A plastic container according to claim 3, wherein said container is round.

6. A plastic container according to claim 3, having a round opening from 26 to 28 mm wide.

7. A plastic container according to claim 3, for holding carbonated beverages with a gas range of from 20 to 75 psi.

8. A plastic container according to claim 3, wherein the tamper bead is discontinuous.

9. A process for lowering the center of gravity of a plastic container for holding carbonated beverages, which comprises:

providing a hollow body of plastic material having a lower supporting base portion, a sidewall portion extending upwardly from the base portion, a neck portion extending upwardly from the sidewall portion, and an opening at the top of the neck portion, the opening being from 25 to 30 mm wide;

wherein the neck portion has an upper screw threaded outer surface for holding a screw threaded closure, a tamper bead beneath the screw threaded outer surface having a top and bottom portion thereof, and a support ring beneath the tamper bead having a top and bottom portion thereof; and

including the steps of lowering the distance from the top of the neck portion to the bottom of the tamper bead, lowering the distance from the bottom of the tamper bead to the bottom of the support ring, reducing the weight of the neck portion to within the range of 2.5 to 4.4 grams, and the lowering the ratio of center of gravity to container height to from 0.4999 to 0.425.

10. A process according to claim 9, wherein the weight of the neck portion is reduced to from 3 to 4 grams.

11. A process according to claim 9, wherein the distance from the top of the neck portion to the bottom of the tamper bead is lowered to from 0.310 inch to 0.525 inch.

12. A process according to claim 11, wherein the distance from the bottom of the tamper bead to the bottom of the support ring is lowered to from 0.250 inch to 0.125 inch.

13. A process according to claim 12, including the step of providing that said container has a round opening from 26 to 28 mm wide.

14. A process according to claim 9, including the step of providing a discontinuous tamper bead.

15. A process according to claim 9, including the step of providing that the carbonated beverage has a gas range of from 20 to 75 psi.