NUK newborn bottles are crafted to meet your little one’s needs right from the start. Clinically tested: Optimal for combining bottle and breastfeeding Particularly soft teat that is right for the jaw, made of silicone From 6-18 months M (Medium-fine hole) Helps prevent colic: The improved Anti-colic air system Easy to fill and clean: Extra-wide bottle neck Hygienic: Bottle made of polypropylene (PP). Launched in the heart of the Baby Boom in the 1950s, Nuk entered the market with high-quality baby products. It has been bringing joy to both parents and babies for more than 60 years.