Nuk Nature Sense glass bottle Nuk Nature Sense, content 120ml with silicone. The design of the Nuk Nature Sense teat based primarily on the medical observation that the mother's breast is formed by lactiferous microchannels. The micro-holes ensure a regular and natural sucking flow. The enlarged and flexible teat base: natural sucking sensation as soon as the baby puts his lips on it. The extra soft zone: makes the tip as flexible as the mother's breast. Contains an innovative anti-colic valve: sucking breast. BPA-free (according to current regulations). Made in Germany.