Lifefactorys 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.