For consumers, determining the quality of a bottle cap is a crucial step. Consumers can start from the following aspects:
1. Observe whether the surface of the bottle cap is smooth and free of defects such as burrs or cracks.
2. Check the seal of the bottle cap: If the protective film is not broken when opening a newly opened bottle, there may be a sealing problem between the bottle and the cap.
3. Try twisting open the bottle cap: If you feel excessive torque when twisting open the cap, or if the cap deforms or breaks when twisted, it may indicate a quality problem with the bottle cap.