Ensure your Avent Anti-colic AirFree Vent Bottles remain secure and leak-proof with these replacement screw rings and caps. Constructed from premium food-grade polypropylene materials, these rings are BPA and lead-free, ensuring your baby's safety. Heat-resistant up to 248°F (120°C), they can withstand dishwashers and boiling water for easy cleaning. Please note that these rings and caps are designed specifically for Avent Anti-colic AirFree Vent Bottles and are not compatible with Avent Natural response nipples or bottles. This aftermarket product from ROMIRUS includes 2 replacement rings and 2 replacement caps, allowing you to keep your bottles in top condition. Bottles are not included. Prioritize your little one's comfort and health with these essential accessories.