Blow-molded container having thread groove

A blow-molded plastic container comprising:

• a body portion extending from an upper portion to a base;
• a finish formed at said upper portion and including a radial sidewall, said finish defined in part by at least one groove formed in said radial sidewall;
• and
• a moil portion extending from said finish in an opposite direction from said body portion, said moil portion adapted to be severed from said finish to define an opening into the container.

A method of making a blow-molded plastic container comprising:

• disposing a preform into a mold cavity having a surface defining a body forming region, a finish forming region and a moil forming region;
• blowing said preform against said mold surface to form an intermediate container having a body portion, a finish and a moil portion, wherein said finish defines at least one groove formed therein;
• and
• severing said moil portion from said finish thereby defining an opening into the container.

A blow-molded plastic container assembly comprising:

• a plastic container comprising:
• a finish having a first radial sidewall and formed at an opening into said container;
• and
• at least one groove formed in an outer diameter of said first radial sidewall, said at least one groove sloping gradually away from said opening;
• wherein an inner diameter of said first radial sidewall defines a non-uniform cross-section;
• and
• a closure member adapted to selectively mate with said first radial sidewall of said container, said closure member comprising:
• a lower portion defining a closure opening;
• an upper portion defining a cover;
• and
• a second radial sidewall extending between said lower portion and said upper portion, said second radial sidewall having an inner surface defined in part by at least one thread formed thereon, said at least one thread adapted to cooperatively engage said at least one groove in an assembled position.