Features: Anti-Sip Safety Design: Our Kids Anti Sip Valve Straw Bottle Lid features a child-safe sip valve to prevent accidental spills and choking, making it ideal for toddlers and young children. The leakproof straw top ensures mess-free drinking anywhere. Universal Fit & Detachable Sizes: This Spill Proof Straw Lid Converter fits most water bottles with 2 detachable sizes (2.8cm/3.5cm calibers), offering versatility for different bottle openings. The dust cover keeps the straw clean and hygienic. Leakproof & Spill-Proof Construction: Designed for active kids, this Kids Drink Cap With Straw prevents leaks and spills, even when tipped over. The secure sip valve ensures controlled drinking flow, perfect for school or travel. Child-Safe & Anti-Choking Straw: The Toddler Anti Choking Sip Straw Bottle Converter features a safety valve that regulates liquid flow, reducing choking risks. Ideal for beverages like water, juice, or milk, ensuring safe sips every time. Durable & Easy-Clean Design: The Student School Water Bottle Straw Lid Adapter is made from high-quality, BPA-free materials. The detachable parts allow for thorough cleaning, maintaining hygiene for daily use by kids and students. Specifications: Material: Food-Grade PP (Polypropylene) and SiliconeSize: 2.8cm/3.5cm diameter Bottle Opening Recommended Age: 9 months and above Include: 1 * Straw Cover