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A preform having an annular wall region of increased wall thickness to produce a blow molded container having an annular concavity in a wall portion thereof to provide a hand grip feature, such a container when blow molded from such a preform and a carbonated beverage container having intaglio hand

A preform having an annular wall region of increased wall thickness to produce a blow molded container having an annular concavity in a wall portion thereof to provide a hand grip feature, such a container when blow molded from such a preform and a carbonated beverage container having intaglio hand grip wall hand grip features.

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1. A preform for blow molding container having a hand grip feature to facilitate handling of the container, the preform having a hollow interior for blow molding the container having a hand grip feature to facilitate handling of the container, the preform defining a longitudinal axis and comprising

1. A preform for blow molding container having a hand grip feature to facilitate handling of the container, the preform having a hollow interior for blow molding the container having a hand grip feature to facilitate handling of the container, the preform defining a longitudinal axis and comprising an integral structure, the hollow interior of which is snaped and sized to allow axial removal of the preform from a core of an injection mold in which the preform is molded, the preform having, in interconnected axial sequence, a container neck finish forming portion defining an opening to the hollow interior, an annular container shoulder forming portion, an annular container first wall forming portion, an annular container intermediate wall forming portion, an annular container second wall forming portion and a closed container base forming portion, wherein the annular intermediate wall forming portion has a wall thickness greater than the first and the second annular wall portions.2. The preform according to claim 1, wherein the closed base forming portion defines an annular base reinforcing ring of a wall thickness greater than a wall thickness of the first and second wall forming portions and greater than a wall thickness of a remainder of the closed container base forming portion.3. A blow molded container having a contour feature to facilitate handling of the container, the preform having a hollow interior for blow molding the container having the contour feature, the preform defining a longitudinal axis and comprising an integral structure, the hollow interior of which is shaped and sized to allow axial removal of the preform from a core of an injection mold in which the preform is molded, the preform having in interconnected axial sequence, a container neck finish forming portion defining an opening to the hollow interior, an annular container shoulder forming portion, an annular container first wall forming portion, an annular container intermediate wall forming portion, an annular container second wall forming portion and a closed container base forming portion, wherein the annular intermediate wall portion has a wall thickness greater than the first end the second annular wall portions, the blow molded container having, in interconnected axial sequence, a neck finish formed by the neck finish of the preform, a shoulder portion formed from the shoulder portion of the preform, first, intermediate and second wall portion formed from the first, intermediate and second wall portions of the preform and a closed base formed from the dosed base portion of the preform, the contour feature comprising an annular concavity in the intermediate wall portion of the preform, the annular concavity having a wall thickness greater than the wall thickness of the first and second wall portions of the blow molded container.