The invention relates to a non-spill valve (1) for the neck or spout (8) of a liquid container, for example a so-called non-spill drinking cup for toddlers and incapacitated persons. The invention also relates to a non-spill valve for the nipple of a feeding bottle for babies and invalids, to a teat for the bottle in which the teat is provided with such a nipple and to a feeding bottle which is fitted with such a teat. The non-spill valve comprises a flexible tube (1) which is open at one end and upstands from an apertured support (6), which is complementary with the interior of the neck or spout or nipple so that it forms a partition and permits the passage of liquid from an aperture (6a) in the support (6) only into the tube interior, wherein the other end (2) of the tube (1) is closed except for an incision (7) which separates the closed end from an adjoining side wall portion (3, 3a) of the tube (1), the incision (7) defining a flap (4) which is hinged to the support wall and lies against the part from which it is severed but can flex under suction and thereby permit liquid to reach from the tube interior to the mouth of the neck or spout or nipple.
