-SIPPY STRAW TRANSITION BOTTLE. Help baby develop new drinking skills using the bottle they know and love! -WEIGHTED STRAW FOR TIP AND SIP. Features a soft, 100% silicone weighted straw that moves with the liquid, so baby can tilt and sip in any direction. -EASY GRIP HANDLES. Soft yet sturdy silicone handles make gripping easy and help teach baby new motor skills. Handles can be removed as cup-holding skills improve. -SPILL-PROOF. Spill-proof lid that’s travel-friendly slides closed to keep the straw clean when not in use. Just flip the lid back to sip when baby wants a drink. -FITS ALL DR. BROWN’S NARROW BOTTLES. Both the sippy straw lid and silicone handles fit all Dr. Brown’s Options+ 8 oz/250 mL baby bottles and sippy spout bottles. -EASY TO CLEAN. All parts are removable and dishwasher (top rack) and sterilizer safe. Straw cleaning brush included.