This is 28mm 30mm 38mm 48mm 55mm plastic cap. It has two kinds: one kind is with PE foam liner or TPR/TPE liner, the another kind is with waterproof ring. The 28mm 30mm 38mm 48mm 55mm plastic cap is for water bottle, juice bottle, carbonated beverage bottle and it’s also for hot filling bottle. Now we developed these kinds of plastic cap with seal ring by Sacmi cap compression moulding machine with much better precision. It can be used by carbonated beverage or hot filling beverage. 28mm 30mm 38mm 48mm 55mm plastic cap material is 100% new material. The plastic cap size is international , and the cap color is customize.