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: Device of the feeding-bottle type comprising: an external tubular body (1) having an open extremity (1b); a flexible capsule or container (3) housed or capable of being housed within said tubular body and presenting also an extremity (C) which is open or arranged to be opened; means(2, 42) allowing to communicate with environmental air, the space (D) existing between said flexible capsule (3) and the body (1); a specific teat (12) mounted or conformed to be mounted ahead of the openings (A, C) of said body (1) and said capsule (3); and an intermediary non-return valve (5) arranged between the open extremity (C) of said capsule (3) and the base of said teat (12) and delimiting with the latter a dispensing chamber (F); characterized in that a second valve (19, 20) is provided in the nipple piece (15) of the teat (12), between the dispensing chamber (F) and the outlet perforations (18) of said teat, said second valve (19-20) allowing the passage of nutrient liquid towards said outlet perforations (18) and opposi