Lightweight neck finish for a container

A container comprising a body defining an interior and a neck, the neck forming a cylindrical shape wherein a periphery of the neck forms a circle that is centered about a vertical axis, the neck coupled to the body and configured to provide fluid communication between the interior of the body and a location outside the container, the container comprising:

• a flow channel defined between a first end and a second end of the neck, the flow channel configured to allow contents to pass through the flow channel in the neck and into or out from the body;
• a thread extending about an exterior of the neck;
• and
• an engagement structure formed about the exterior of the neck at a location below the thread, the engagement structure comprising:
• an upper bead having an upper surface and a lower surface, the upper surface extending along a curve from the exterior of the neck to a first outermost circle about the periphery of the upper bead that is centered on the vertical axis, the lower surface extending generally perpendicularly from the exterior of the neck to the first outer circle;
• and
• a lower bead located below the upper bead, the lower bead comprising a first section divided from a second section, the first section and the second section extending from the exterior of the neck to a second outermost circle about the periphery of the lower bead that is concentric and smaller than the first outer circle;
• and
• a circumferential groove located between and dividing the first section and the second section of the lower bead.

A container comprising a body defining an interior and a neck, the neck forming a cylindrical shape wherein a periphery of the neck forms a circle that is centered about a vertical axis, the neck coupled to the body and configured to provide fluid communication between the interior of the body and a location outside the container, the container comprising:

• a flow channel defined between a first end and a second end of the neck, the flow channel configured to allow contents to pass through the flow channel in the neck and into or out from the body;
• a thread extending about an exterior of the neck;
• and
• an engagement structure formed about the exterior of the neck at a location below the thread, the engagement structure comprising:
• an upper retention support having an upper surface and a lower surface, the upper surface extending along a curve from the exterior of the neck to a first outermost circle centered on the vertical axis, the lower surface extending from the exterior of the neck to the first outermost circle;
• and
• a lower retention support located below the upper retention support, the lower retention support having an upper end and a lower end, wherein the lower retention support has a tapered frustoconical surface, wherein the lower retention support extends to an upper outermost circle at the upper end and extends to a lower outermost circle at the lower end of the lower retention support, the upper outermost circle having a diameter greater than that of the lower outermost circle.