Nuk nature sense glass bottle \ \ with temperature control indicator 0-6m \ \ the integrated temperature control indicator changes color if the food is too hot. the blue indicator turns white. \ \ \ \ \ the nipple "imitates" the mother's breast, down to the last detail. \ \ the nuk nature sense nipple has a multitude of tiny holes, modeled after the milk-bearing pores of the mother's breast. \ \ this allows for the optimal, uniform and natural flow of the liquid. \ \ even the shape of the nipple simulates the mother's nipple during breastfeeding, because it adapts flexibly to the baby's tongue and palate during feeding. \ \ the nature sense nipple imitates this shape. its material is soft and gives your baby's lips this feeling of familiarity. \ \ \ The multiple tiny holes, which are modeled after the mother's breast, provide an ideal, smooth and natural flow. \ Wide, flexible nipple base with an extremely soft nipple tip, similar to the mother's nipple. \ The innovative anti-colic vent system helps prevent air swallowing. \ The borosilicate glass bottle is BPA-free. \ For children aged 0-6 months \ 240ml, size M with 6 holes (for slow flow rate) \ \