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 All parts are made of 100% safe food-grade material Our 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, and much more. Made of borosilicate glass which is extremely durable and heat resistant