The nipple has been specially developed to match the nipple from our BIBS Colour pacifier which promotes the right sucking technique for successful breastfeeding. The nipple is produced from soft natural rubber latex and designed with an anti-colic valve. Nipples are available with both slow and medium flow. Contains a milk lock for easy and hygienic storage and a funnel to fill up the bottle fast and easily. We recommend replacing the nipple every 4-6 weeks.