This is 28mm 1881 cap. It is for beverage bottle, milk bottle, and it’s also for hot filling bottle. About the cap production, the cap will be made in the plastic injection machine, and then the cap will be folded on the folding machine, at the last, the cap will be on the liner machine to add liner. From the complex production, the 28mm liner cap is in good waterproof, and at the 85℃ it will not deform. 28mm plastic cap is international , but the cap color is customize. If you have your own logo,we can print or engrave the logo depend on customers’ requirements. The 28mm plastic cap material is 100% new material.We have standardized production workshop. It’s safe and healthy. And for our customers, we often send the videos to show the production details.