Ready to upgrade your bottle feeding routine? BIBS Glass Baby Bottle offers a sleek, award-winning design with an anti-colic valve designed to help reduce air intake and bubbles, a breast-like nipple to help ease the transition between breastfeeding and bottle-feeding, and a built-to-last durable borosilicate glass base. Comes with a natural rubber latex nipple, a material known for its skin-like softness and flexibility designed to closely mimic a real nipple. Medium flow/ BPA-Free / Ages 0+