| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester resin bottle which adopts an amorphous mouth, can reduce the weight of the mouth, can prevent a cap from abruptly coming off in opening even under a temperature condition for sale in heated states, and can perform smooth opening operation.SOLUTION: A polyester resin bottle includes an amorphous mouth 1 sealed by a cap 5, and has a spiral screw 2 screwed with the cap 5 formed on a predetermined region on the outer peripheral surface of the mouth 1. The mouth 1 is formed so that thickness in a radial direction other than a thread ridge 2a in the screw 2 is smaller than thickness in a radial direction other than the screw 2. |
