Make bottle feeding easier with una teat that imitates the breast. The baby bottle Philips Avent Natural Response 0 m+ supports the rhythm naturale of suction thanks to una specially shaped teat. It releases the liquid only when the bambino Actively sucks – allowing him to suck, swallow, and breathe as if he were breastfeeding. The anti-colic valve keeps air out of the baby's belly. bambino, reducing the risk of bloating, colic or reflux.