Cup with grooves

A cup, comprising:

• a base;
• and
• a sidewall extending upward from the base to a top of the cup, wherein the sidewall tapers at an angle between 4° and 12° from the base,
• wherein the sidewall comprises an upper sidewall and a lower sidewall,
• wherein the upper sidewall comprises an upper diameter between 3.0 inches and 4.5 inches and the lower sidewall comprises a lower diameter between 3.0 inches and 4 inches,
• wherein the sidewall comprises a step change from the upper diameter to the lower diameter between the upper sidewall and the lower sidewall,
• wherein the sidewall comprises a perpendicular portion connecting the upper sidewall and the lower sidewall,
• wherein the lower sidewall comprises a plurality of channels or grooves arranged around an outer circumference of the lower sidewall and extending in a direction between the base and the top,
• wherein first ends of the plurality of the channels or grooves terminate distal to the perpendicular portion of the sidewall.

A cup, comprising:

• a base;
• and
• a sidewall extending upward from the base to a top of the cup,
• a plurality of grooves or channels extending around an outer circumference of at least a portion of the sidewall,
• wherein a middle portion of the sidewall comprises a length between 1 inch and 4 inches, wherein the middle portion of the sidewall extends at least 0.5 inches above and below a center of the cup along a longitudinal axis,
• wherein in the middle portion, the plurality of channels or grooves comprise a first width between 0.05 inches and 0.065 inches and a first depth between 0.05 inches and 0.065 inches.