Walter Stern Shallow Form Watch Glasses

Walter Stern Shallow Form Watch Glasses. The funnels ensure that exhaust fumes vent upward and away from the user. The funnel covers and lays down the glass panes in a shallow dish thus preventing contamination of the viewing or mixing end by dust dirt or water. The small funnels at the larger funnel ends permit mixing directly on the benchtop or by infusing a colored dye to the water stream. The color of the glass is not affected by the dye lots. The funnels may be filled from outside the conta