Is spelled with an accent: Porrón.
Widely used in the Cataluña area of Spain, the porrón is a glass bottle shaped similar to a bong pipe or a "bota" bag (the one you take to the bullfights filled with your favorite refreshment, which you squeeze towards your mouth.). You can't squeeze the porrón, but you can point it towards your mouth and tilt it to get a thin stream of liquid to swallow. It takes some practice. Try it with Sangria.
Check out http://www.webgourmand.com/html/porron.html