| 摘要 |
A container has a grounding portion that is free from sink and can prevent sink from occurring, so that it can secure its self-standing ability. The bottle-shaped container made of synthetic resin comprising a neck, a body and a bottom, said bottom including a grounding portion, said bottom being formed at a center thereof with a central bulged section protruding inwardly, said container showing a polygonal transversal cross section, characterized in that a peripheral bottom wall is formed between an outer periphery of the central bulged section and the grounding portion, said peripheral bottom wall forming a step located below the central bulged section and above the grounding portion, and said grounding portion is provided with a recess in a portion formed with an orientation magnification which is smaller than an orientation magnification with which a portion on and along a diagonal line is formed.
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