CAUTION: These glass chemist rounds are sold on the basis of their decorative and collectable nature. They are antiques and may contain, or contain traces of, harmful, toxic or even lethal material - liquid, powder or solid. LASSCO will accept no responsibility for any injury, harm or death arising from contact with these jars or their contents and we strongly advise that their contents or residues are not used, and if disposed of, are disposed of safely and responsibly. LASSCO insists that these items are displayed out of the reach of children, animals or anyone who may not understand the potential dangers of the jars and their contents. We accept no responsibility for issues concerning the export of the contents or residues within the jars and suggest that the contents are checked prior to their being packed for export.