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 in the bottle 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 WIDE-NECK BOTTLES. Both the sippy straw lid and silicone handles fit Dr. Brown's Options+ Wide-Neck 9 oz/270 mL