This product is a milk storage bottle gasket, which is mainly made of mild silicone material. It has a softer texture and high flexibility. It is suitable for milk bottle caps of various calibers. It can help you better seal and make breast milk more Safe and , it is an indispensable product for mothers and babies. Features -Color: White. -Material: Silicone. -Size: About 5.20X5.20X1.30cm/2.04X2.04X0.51inch. -Made of a softer silicone material, it is flexible and durable, and is suitable for feeding bottles of most calibers. -The milk bottle gasket has fine workmanship, excellent texture, high temperature resistance, can withstand high temperature , and is very safe. -It is an indispensable accessory to help you better seal the milk storage bottle. -Made with excellent craftsmanship, it is safe and durable, with excellent texture, and will not tear easily. -The milk storage bottle gasket has a good leak-proof sealing effect, making your breast milk storage safer. Package list: 10 x Sealing Rings