Nursing bottle with an opening at each end and an inlet valve in the base

摘要

A nursing bottle 1 has an open neck 11 and an open base 12. The base is sealed by an element incorporating a one—way air inlet valve 124; the element may be a disc 123 in which a valve 124 is seated, or it may be a teat (113, figure 12) extending into the bottle. The element is secured by an annular bottom cap 121 which screws onto the base of the bottle. The neck of the bottle is closed by a teat 112 secured by an annular top cap which engages with a screw thread on the bottle neck. The inlet valve may have arms of resilient silicone rubber (figure 2) or may be a ball valve (figures 7 and 8). There may be three inlet valves in the base of the bottle (figure 4).