Product review (4 stars): Good for the laboratory
I bought this for work to avoid accidental showers from cleaning laboratory glassware.  It was actually hooked up to the deionized water line (after borrowing a connector from another sink to use the manufacturer's spout adapter).  This unit also comes in handy when you need a few rinses on a sinkful of dishes.  Be warned, however; capacity-wise, Erlenmeyer flasks should not have more than 1 L, beakers not more than 4.5 L.