Helps toddlers succeed with the 3-Phase Developmental Drinking Method (Dawn Winkelmann, M.S, CCC-SLP) | Straw serves as both a Beginner Training Straw + an Advanced Training Straw | Reduces spillage and 100% Food Grade Silicone (BPA, BPS, PVS, phthalate and latex free) | Portion Size: 4oz | Dishwasher safe and built to last (silicone will not wear, fade or corrode)