・Kid-proof design: unbreakable stainless steel interior and exterior inhibits bacteria growth; leak proof valve prevents messes and is easy to clean ・Made from Bisphenol-A free (BPA free) materials?and feature interchangeable parts that fit other Foogo Phases cups ・Phase 3 for children ages 18 months and up; easy to open hygienic push button lid with pop-up silicone straw ・10 ounce capacity， hand wash/top shelf dishwasher safe