A vacuum bottle container of the kind having an air pump adapted to feed air into the interior of the vacuum bottle to increase the internal pressure in the bottle, whereby the liquid in the vacuum bottle is poured without inclining or holding up the container. The vacuum bottle comprises a cylindrical...http://www.google.com.au/patents/US4116366?utm_source=gb-gplus-sharePatent US4116366 - Vacuum bottle container with air pump having vent closing switch
