THOUGHTFULLY DESIGNED: The Happy Cup + Straw System teaches older toddlers / preschoolers to drink from a larger open cup (8oz) and learn to use a more advanced straw. Sensory bumps keep the child’s lips at the tip of the straw, and the weighted base provides topple resistance. DESIGNED + TESTED BY A PEDIATRIC FEEDING EXPERT: All ezpz products are designed to help children meet milestones safely and effectively. The Happy Cup + Straw helps toddlers / preschoolers succeed with open cup and straw drinking milestones. WHY STRAW DRINKING IS IMPORTANT: Learning to drink from a straw is an important developmental milestone that develops lip rounding, supports the development of a mature swallow, and promotes speech development. QUALITY MATERIAL: The Happy Cup, Lid and Straw are made from food-grade silicone that is BPA, BPS, PVC, latex and phthalate free. Soft silicone reduces potential injury to the mouth. EASY TO USE: The Happy Cup + Straw can be introduced at 24+ months. All components are dishwasher safe and safe to use with cold, warm and hot liquids.