A package for storing, incubating or transporting an anaerobic culture comprising a bag of flexible sheet material of low gas permeability, a self-contained gas generating apparatus in the bag for generating at least a reducing gas, a culture retaining container in the bag, and a catalyst in the bag...http://www.google.de/patents/US4038148?utm_source=gb-gplus-sharePatent US4038148 - Anaerobic environmental system for bacteria culture testing
