| 摘要 |
PCT No. PCT/GB96/02154 Sec. 371 Date Jul. 7, 1997 Sec. 102(e) Date Jul. 7, 1997 PCT Filed Sep. 2, 1996 PCT Pub. No. WO97/08979 PCT Pub. Date Mar. 13, 1997A lid (1) for a drinks container has a mouthpiece (6) provided with a valve (2) which comprises a membrane (7) of resiliently flexible material formed generally at its center with at least one slit or other piercing (8) which is normally sealed. The membrane (7) is dished inwardly of the mouthpiece, but when suction is applied, it is caused to invert to allow liquid to be drawn through its slit(s) (8). The valve (2) may instead be provided in the top of a drinks carton or in the end of a drinking straw. |
