Sometimes called the Cusenier "Auto Verseur", see-saw, balancier or "Ticky-Tocky"*, this stainless steel, self water-powered brouilleur balances on top of your absinthe glass, dripping alternately on one side of your spoon and the other.

*  OK, I haven't heard "Ticky-Tocky" from anyone other than us, but, hey, that's how language evolves.  There's a glory for you!