fig5 so that central part of lid 9 remains attached to its sealed peripheral part after cut 19 is made unscrewing of the cap is completed without intervention of blade 18 as shown in fig4 until the cap can be removed the cut central part of lid 9 is then torn away entirely and the container can be used its contents being poured out by opening 8 the cap can then be rescrewed onto neck 7 and be used as long as it is desired to close the container fig6 to 9 represent another cap made up mainly of a body 21 a covering 22 a hinge 23 connecting covering 22 in an articulated manner to body 21 body 21 of the cap provided to fit on neck 24 of a flexible or rigid container such as a flask see fig8 and 9 comprises a cylindrical skirt 25 whose top is connected to a circular bottom 26 on the inside skirt 25 comprises a thread 27 making possible holding of the cap by screwing on neck 24 of the container bottom 26 exhibits a pouring orifice 28 of elongated rectangular shape off center in position which is surrounded by a flange 29 turned toward the outside making it possible to spread the product contained in the container the outside.