I was in need of a certain size cap with requirements. I was lucky to get the best customer service person Joanna Lee. She never gave up on me. Joanna would show me different samples, and when I said no that wouldn't stop her she would look for more samples. With her eagerness to give me great customer service, she found a cap that I wanted. I think that is GREAT customer service. The product is of excellent quality. I highly recommend Zhejiang Sanle Plastic Co and hopefully, you will get Joanna.