| 摘要 |
PROBLEM TO BE SOLVED: To provide a bottle having a formed positioning recess capable of improving the shaping property of the positioning recess formed on a bottom wall part.SOLUTION: A bottle 1 is formed into a bottomed cylindrical shape by blow molding. A bottom wall part 19 comprises a grounding part 18 positioning at an outer peripheral edge, and a caving part 31 continuing into the grounding part 18 from inside in a radial direction and hollowing inside in a bottle axis O direction. The caving part 31 includes a positioning recess 32 hollowing upward, and an auxiliary protrusion 41 which is formed to the portion trending to a circumferential direction around at least a bottle axis O and corresponding to a positioning wall part 35b extending in the bottle axis O direction among the wall face defining the positioning recess 32 in the outside of the recess 32 in a radial direction, and protrudes downward.SELECTED DRAWING: Figure 2 |
