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