Bottle - mouth-blown glass - Fly and wasp catcher

A mouth-blown fly catcher on three legs (thus always stable). To catch the flies, one puts a bit of beer or other sugary drinks in the bottom of the bottle. Once inside the bottle they drown in the liquid or fly around until they give up, because they can't find a way to escape through the opening at the bottom. Eco-friendly and efficient. The cork is easy to remove.