Simply serve the desired dose of absinthe at the bottom of a glass and place the absinthe scrambler on top.
Fill the reservoir with cold water and let the wormwood scramble on its own. Ideal when you don't have a fountain or when you are too lazy to take it out.
A good tip is to add some ice cubes to the tank. This plays a double function; on the one hand, it refreshes your water and on the other, the cubes slow down the water flow to provide a more aromatic absinthe.
The slowing effect can also be achieved by adding a cube of sugar, or even a glass ball, if you have nothing else on hand. This standard-size absinthe scrambler (85 mm in diameter) will fit very well on the vast majority of glasses of absinthe.