三. Bottle Design Features 3. Neck and Shoulder Areas ⚫ The impact on filling, air displacement, and dispensing. Fill level in long narrow necks Headspace for thermal expansion and facilitate filling. ⚫ Manufacturing defect -choke neck Ridge on the sealing surface-overpress ⚫ Upper shoulder - below the neck. ⚫ Shoulder and neck blending -important design and production. lower shoulder-the integration point between the upper shoulder and the body. Contact area三. Bottle Design Features 3. Neck and Shoulder Areas ⚫ The impact on filling, air displacement, and dispensing. Fill level in long narrow necks Headspace for thermal expansion and facilitate filling. ⚫ Manufacturing defect -choke neck Ridge on the sealing surface-overpress ⚫ Upper shoulder - below the neck. ⚫ Shoulder and neck blending -important design and production. lower shoulder-the integration point between the upper shoulder and the body. Contact area