Safety Opener is a device having a toothed opening corresponding to the ridges of a standard twist off bottle cap. To use Safety Opener, a consumer simply places a twist off bottle cap attached to a bottle underneath the toothed opening. When the bottle opener or bottle is rotated in the appropriate...http://www.google.co.uk/patents/US7343835?utm_source=gb-gplus-sharePatent US7343835 - Safety opener
