A vent device for nursing bottles which enabling an external air will flow toward the inside of nursing bottle when feeding the infant with objective to prevent a vacuum within the bottle therefore an infant could suck the liquid from the bottle more comfortably. Besides its function for venting air towards the inside of nursing bottle, the vent device of present invention has an additional function as a pediatric medicine delivery system for baby and severe ill persons where the vent device is designed to allow a pipette or an injection syringe for dispensing medicine, vitamin towards the inside of nursing bottle would facilitate the infants parent to provide a better healthcare programs for their beloved babies. While in another aspect, the application of this vent device has function for releasing too much excessive gas in the various liquid containers thru the air passage created in the vent device which is linked to the outside of the container via a fissure on the cap of the container. The vent device is designed to be put at the bottom of nursing bottle within the liquid surroundings which fills the inside of the bottle and other variations at any other side of nursing bottle. It is consist of several compartments and several one-way valves in fluid communication with the vent aperture. For its other function which intended to solve excessive gas problem generated by chemical liquid in various containers, the vent devices suitable position is at the orifice of the container which is unoccupied or free from liquid surrounding, may separated or incorporated with the bottle cap.La présente invention concerne un système de ventilation pour biberons qui permet lécoulement dair de lextérieur vers lintérieur du biberon lors de lalimentation du nourrisson, avec pour objectif dempêcher le vide à lintérieur du biberon et ainsi de permettre au nourrisson de téter plus confortablement le liquide à lintérieur du biberon. Outre sa fonction de ventilation dair vers lintérie
