Frequently Asked Questions Can I sterilise 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 sterilised. Find out which parts to sterilise. Nipple protector The Nipple Protector should always be sterilised before use, either in a Philips Avent Steam Steriliser or by boiling for 5 minutes. The display case is not suitable for sterilisation.