When baby is ready to learn straw sipping skills, take baby steps with the Dr. Brown?s? Milestones? Wide-Neck Sippy Straw Bottle. Baby can continue to use the bottle they love while learning new sipping skills. The soft silicone straw is weighted so baby can tilt and sip while learning upright straw skills. Soft yet sturdy silicone handles make gripping easy and help teach baby new motor skills. A sliding cap keeps messes contained when closed and offers spill-proof travel. Both the sippy straw cap and silicone handles fit all Dr. Brown?s? Options+? Wide-Neck 9oz/270mL baby bottles and sippy spout bottles, meaning you can teach baby many new sipping skills with the same bottle! Dishwasher (top rack) and sterilizer safe. BPA free. 6m+.