1. Dust cap ,used in smart cap,bule 2.Overall brightness, colour and lustre is well-balanced, feel smooth, no peculiar smell 1.Name dust cap,used in warter bottle smart cap, bule ,no LOGO2.Overall body is brightness ,color and lustre is well-balanced,feel smooth,no peculiar smell3.The more order you offter,the lower price you have4.We proise that delivery timely , good quality.