Fecha de publicación: 23/06/2005 Fuente: WIPO "olive oil" AIR VENT FOR LIQUID CONTAINERS BASED ON THE PRINCIPLE OF COMMUNICATING VESSELS, developed to be used in different types of containers, i.e. baby bottles, flask, or other similar recipients (1) for the conditioning of any liquid easily poured through the upper spout (2) combined with any type of lid (3) to close the aforesaid flask (1); which also may be manufactured using any kind of material, as also it is considered upper spout (2) any outlet for the liquid inside the flask or container (1), where this spout can have the characteristics known to a nipple or a hard plastic spout or even a metal spout, as those used in olive oil cans, be they retractile or not, such container (1) includes an air vent (4), defined by a system based on the principle of communicating vessels and in the balance of pressures, defined by a duct of an adequate diameter (5) placed in a vertical or oblique manner, whose lower end (6) is placed inside and in the bottom of the flask (1), while the upper end (7) completely open, is placed outside and at about the height of the lid (3), where the mentioned end configures external air inlet to the bottom of the flask or lower end (6), when the aforesaid flask is sufficiently poured, so that the liquid inside the duct or air vent tube (5) may go to the bottom of the container, enabling the free flow of external air from the entrance (7) to the bottom of the container (6), without passing through the liquid (L) and blocking the formation of vacuum in the bottom of the container (1), before even this same liquid be discharged or sucked from the container (1).