The baby bottle is carefully designed for babies and parents. The bottle is designed with the child’s needs in mind and is made of borosilicate glass, which is temperature- and thermal shock-resistant, durable, shatter-resistant. Further, it does not emit microplastics into the milk. Made of borosilicate glass which is extremely durable and heat resistant Does not emit microplastics into the milk Round nipple in natural rubber latex (slow flow) The round nipple matches the nipple from our popular BIBS Colour pacifier Designed with an anti-colic function, this ensures a smooth milk flow, that reduces air swallowed while feeding. All parts are made of 100% safe food-grade material Glass is the absolute purest material for both food and beverages. The glass type is first class temperature-resistant borosilicate glass, the bottle withstands freezing, thawing in boiling water, microwave heating, and dishwasher cleaning. The nipple has been specially developed to match the nipple from the 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. Features both ml and oz measurements.