1. Capacity
Weigh the empty bottle with a weighing instrument with a sense of 1g, and then pour it with water at room temperature. The difference between the secondary masses is the capacity.
2. The outer diameter and roundness of the bottle body
Use a vernier caliper to measure the bottle body (deviate from the seam line), the maximum value of the measurement is the outer diameter of the bottle body, and the difference between the maximum and minimum is the roundness.
3. Vertical axis deviation
According to GB/T 8452 regulations.