Bottle of unknown liquid, prop from Envair Class II Microbiological Safety Cabinet, supplied by Envair Ltd, Haslingden, Rossendale, Lancashire, UK, 1993
Bottle containing unknown orange liquid, prop from Envair Class II Microbiological Safety Cabinet, for the safe handling of microorganisms in the laboratory, supplied by Envair Ltd, Haslingden, Rossendale, Lancashire, UK, 1993