Vented baby bottle

A baby bottle comprising:

• a generally barrel shaped container having a circular open top and threads surrounding the outside of the open top;
• a top cap having a top portion and a threaded side portion, the threaded side portion being capable of removably securing the top cap to the container, the top portion having a circular central opening and a top cap vent opening between said circular central opening and said side portion;
• a nipple having a small opening at one end and a large opening at the other end, means for securing said nipple in said circular central opening of said top portion, a flange surrounding said large opening and extending outwardly therefrom, said flange having an upper side and a lower side, a vent opening passing through said flange from said upper side to said lower side, means on said lower side of said flange for securing a tube to said nipple in communication with said vent opening,
• said top cap vent opening, said flange vent opening and said tube creating a passageway from the inside of the container to the outside atmosphere,
• at least one filter in said passageway, at least one one-way valve in said passageway, said one-way valve opening to allow atmospheric air to enter the container and closing to prevent liquid in the container from escaping from the container through the passageway,
• whereby when said tube is secured to said nipple, said nipple is secured in said top cap, and said top cap is threadably secured to said container, with said nipple flange located between said open top of said container and an underside of said top portion, then said top cap vent opening, said flange vent opening, and said tube are in communication to form said passageway, and the inside of said container is vented through said passageway for the entry of air into said container as liquid is removed therefrom.