Abstract: Apparatus and method for generating an anaerobic or microaerophlic atmosphere. A package consisting of a foil envelope has internal compartments for a hydrogen generating material, for a catalyst and for receiving water. The catalyst compartment is provided with a flash arrestor. Water, on being added to the envelope, reacts with the hydrogen generating material. The liberated hydrogen then reacts catalytically with oxygen in the atmosphere external to the package.

Abstract: Apparatus and method for generating an anaerobic or microaerophilic atmosphere. A package consisting of a foil envelope has internal compartments for a hydrogen generating material, for a catalyst and for receiving water. The catalyst compartment is provided with a flash arrestor. Water, on being added to the envelope, reacts with the hydrogen generating material. The liberated hydrogen then reacts catalytically with oxygen in the atmosphere external to the package.

Abstract: A dispenser mechanism is provided for capping squeeze-bottle type containers, wherein a dual valve arrangement provides for the dispensing of the contents of the container with automatic closure during periods of non-use. The contents of the container are not exposed to ambient until such time as it is dispensed. The dual valves respond to differences in pressure, and cooperate to dispense the contents of the container, or seal the openings thereof during non-use. The cap may include a dispenser spout which is cleaned of material at the end of the dispensing period by the action of the dispenser mechanism herein.