Pour the vodka into a cocktail glass. Carefully add the raspberry syrup, but do not stir. Possibly let it run in over a spoon. This results in nice layers. Then let the Tabasco drip into the vodka (approx. 10 drops, depending on the degree of heat required) 3 layers should now be visible. At the very bottom is the raspberry syrup, above the Tabasco and at the very top is the vodka.