The Dr. Brown's Wide-Neck Glass Bottle Sleeve is a protective cover designed specifically for 9 oz / 270 ml wide-neck glass baby bottles. Made from 100% silicone, this sleeve not only provides a secure grip but also helps prevent bottle breakage and reduces heat transfer, ensuring that your baby can safely enjoy their feeding experience. The pink color adds a touch of style, making it a must-have accessory for parents using glass bottles.