Coating film hardness: The outer surface coating film hardness is not less than 1H pencil hardness. Adhesion: The adhesion of the coating film is not less than level 1. Opening and over-shifting torque: The opening and over-shifting torque of the screw-top lotion bottle should comply with the requirements in Table 6. Component detachment force: Component detachment force should comply with the requirements in Table 7. Sealing performance: After sealing test, there should be no water leakage, no deformation, no cracking, no cracks in the coating film and surface decoration pattern, and no obvious discoloration. Drop performance: After a drop test, there is no leakage, no impact on use, or breakage. This test does not evaluate glass lotion bottles. Number of pump air pressure starts and pump output: The number of pump air pressure starts is no more than 6 times, and the allowable deviation of pump output is ±15%. Fatigue resistance: Press fatigue limit no less than 500 times.