Plastic container with internal mixing ribs

A cylindrical plastic paint can comprising

• a. a circular sidewall having a top with an open end and being at 90 degrees to a bottom with a closed end, said sidewall being entirely vertical from the top to the bottom and having an interior wall, a center having a longitudinal axis and a lid,
• b. affixed to the open end, the rim having an inner rim border having a distance from the interior wall,
• c. a plurality of mixing ribs integral to the interior wall and the bottom, each of said mixing ribs having a vertical axis, a tip and a height from a base at the interior wall to the tip not exceeding the distance of the inner rim border from the interior wall,
• such that when the lid is joined to the rim and the paint can holding paint is spun or agitated in a paint mixing machine, the paint mixes thoroughly.