1)Made of 100%food grade slicone 2)Nontoxic .tasteless ,with excellent heat& tear -resistand. 3)Material conform to the standard of FDA & LFBG. 4)customized design are accepted. 5)very comfortable and flexible for baby to use. 6)careful designed to closed to the form and fuction of the breast. 7)OEM & OEM are high welcom.