Abstract: A plastic container that is adapted for adjustment to internal volumetric changes such as those that typically occur during the hot fill process includes a container body defining an internal space. The container body has a sidewall that is shaped to define at least one flexible panel. The flexible panel has a central longitudinal axis, an upper portion, a lower portion and a central portion. The central portion of the flexible panel has a width that is greater than a respective width of at least one of the upper and lower portions. The flexible panel is substantially flat as viewed in a longitudinal cross-section taken along the central longitudinal axis. Additionally, the central portion has a transverse radius of curvature that is greater than a transverse radius of curvature of at least one of the upper portion and said lower portion.

Abstract: A plastic container that is preferably formed using a blow molding and trimming process includes a container main body portion and a lid mounting portion. The lid mounting portion includes a sealing flange and a flexible transition portion connecting the sealing flange to the container main body portion. The flexible transition portion preferably has at least one notch defined therein so as to form a hinge permitting downward movement of the sealing flange when a lid is secured on to the container. In another embodiment, more than one notch is provided defining multiple hinges that provide a compound hinge effect in order to reduce stresses on the molded plastic material during use of the container.