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. Unlike other straw sippy cups, the Milestones™ Sippy Straw Bottle features a sliding cap that keeps messes contained when closed and offers spill-proof travel. It’s not just a sippy cup with handles – both the sippy straw cap and silicone handles fit all Dr. Brown’s™ Options+™ 8oz/250mL baby bottles and sipp