SIPPY STRAW BOTTLES FOR BABIES AND TODDLERS. When baby is ready to learn straw sipping skills, take baby steps with the Dr. Brown’s Milestones Sippy Straw Bottle. WEIGHTED STRAW FOR TIP AND SIP. More than just a straw sippy cup - Milestones Sippy Straw Bottle features a soft silicone straw that is weighted so baby can tilt and sip while learning upright straw skills. EASY GRIP HANDLES. Soft yet sturdy silicone handles make gripping easy and help to teach baby new motor skills. SPILL PROOF WHEN CLOSED. Unlike other sippy cups, this bottle features a sliding cap that keeps messes contained when closed and offers spill-proof travel. Just flip the cap to sip when baby wants a drink. FITS ALL DR. BROWN’S NARROW BOTTLES. Both the sippy straw cap and silicone handles fit all Dr. Brown’s Options+ 8oz/250mL baby bottles and sippy spout bottles. This means you can teach baby many new sipping skills with the same bottle! Dishwasher (top rack) and sterilizer safe. BPA free. 6m+.