The cosmetic dispenser is comprised of a barrel that is closed at a lower end by a screw and elevator assembly and on the upper end by an integrally molded top wall. The integrally molded top wall has a weakened area at its periphery and a gripping means such as a loop whereby the top wall can be removed...http://www.google.com.hk/patents/US6419412?utm_source=gb-gplus-share專利 US6419412 - Positively sealed cosmetic dispenser
