Lifefactory’s reusable bottle system is made for the years ahead. As your little one graduates from “cradle to kiddo”, they will love drinking from this pivot straw cap (for ages 12+ months). The straw is designed to fold down into the lid. When using keep straw in the upright position. Use with Lifefactory 8oz stainless steel or 8oz glass baby bottle. Includes: (1) Polypropylene Pivot Straw Cap (12+ months) Color: White. Size: 2.75"W x 2.75"D x 1.75"H.