NUK Temperature Control: this indicator gives the assurance that the contents of the bottle are not being fed too hot. If the food is too hot, the normally blue indicator will turn white Right for the jaw, particularly soft silicone teat, BPA-free 300ml NUK First Choice+ baby bottles made of polypropylene (PP) with silicone teat 0-6 months M (formula) Clinically tested*: for an optimal combination of breast and bottle feeding Unlimited combinations – with all NUK First Choice products