Frequently Asked Questions Can I sterilize the Philips Avent products? When it comes to your kids, you cannot be cautious enough. That is why some of your Philips Avent products can be sterilized. Find out which parts to sterilize. Nipple protector The Nipple Protector should always be sterilized before use, either in a Philips Avent Steam Sterilizer or by boiling for 5 minutes. The display case is not suitable for sterilization.