Red food colouring dripped into a tall narrow, straight-sided, clear glass vase. The water had thousands of microscopic bubbles which give the speckled effect. A little bit of manipulation in Photoshop and, voila!
Olympus E-3; Zuiko 12-60mm@54mm; ISO 100; f22; Olympus FL-50R flash used off camera.
In 'real-life' I work for the NHS, the rest of my time largely being taken up with photography and associated topics. I enjoy trying different things with photography and would rather take a dozen crap shots than miss that one 'million dollar image'.