Resin container

A resin container, comprising:

• a mouth portion;
• a shoulder portion;
• a body portion;
• and
• a bottom portion, and
• the body portion having a substantially polygonal column shape, wherein
• at least part of the body portion is provided with a specific portion having a shape of a parallelogram whose internal angles are not right angles when two pairs of opposing sides in a cross-section of the body portion are extended.

A resin container, comprising:

• a mouth portion;
• a shoulder portion;
• a body portion;
• and
• a bottom portion,
• the body portion having a substantially quadrangular cylindrical shape,
• the shoulder portion having a shape continuously connecting the mouth portion and the body portion, and
• the shoulder portion including a protruding rib having an arch shape and extending between two vertex portions opposed to each other in a plan view.

A resin container, comprising:

• a mouth portion;
• a shoulder portion;
• a body portion;
• and
• a bottom portion, wherein
• the body portion includes protruding ribs extending in a vertical direction at respective two locations symmetrical with respect to a plane including a central axis connecting a center of the mouth portion and a center of the bottom portion.