• CONTENTS: [Light Blue Collar Sealing Disc] x 6; Replacement parts compatible with Avent Classic Bottle parts; Replacement to Maymom SureSeal writeable disc.
• LEAK-RESISTANT DESIGN: Maymom SureSeal silicone disc functions as 100% leak proof sealing disc during auto or air travel.
• WRITEABLE TOP: Can write with most regular ball pens or dry eraser marker to mark the label. No need to buy other bottle labels. Make sure to remove the writing before dishwashing cleaning or the ink become non-removable.
• EASY TO MAINTAIN: Reusable baby bottle travel caps are dishwasher compatible (top rack), suitable for electric sterilizers, microwave sterilizers, or boiling water. BPA-free for safety.
• NOTE: This product is NOT designed to fit the nipple of Philips Avent Natural Baby Bottle.