Abstract: A nursing bottle includes an outer open body which houses a flexible casings that is intended co contain the fluid food product, a flexible nipple which is used to dispense the product, a check valve which is disposed between the opening in the casings and the nipple and, close to the end of the nipple which is pierced with at least one slit, a second check valve which can open and close depending on whether or not suction and/or pressure respectively is/are being applied. The nipple is provided with a mechanism to enable the slit to switch from a closed position in an impervious manner to an open position such that the food product can pass therethrough when a predetermined pressure is exerted by the mandible. In this way, the slit forms the second check valve.

Abstract: Disclosed is a suspension spring for a vibrating piezoelectric plate including a first part fixed on a base and a second part for supporting the vibrating plate, the second part a tongue having a first and second end, the second end of the tongue supporting the vibrating plate, the spring being designed so that the end of the tongue which is the closest to the fixing point of the first part to the base is that which supports the vibrating plate.