Container (1, 10) for containing a liquid, in particular an infusion liquid or irrigation liquid, with a liquid phase containing the liquid (6) and a gas phase (4), being configured in the operating position in the area bottom of the container (1, 10) a liquid opening and the container presenting a gas opening, gas opening that is formed by a gas tube (3), which has a first end of a gas tube (12) and a second end of the gas tube (13), the first end of the gas tube (12) reaching the gas phase (4) of the container (1, 10) and the second end of the gas tube (13) flowing out of the container (1, 10), characterized in that the gas tube (3) is non-detachably connected to the container (1, 10), that the first end of the gas tube (12) is provided with a closure, that the gas tube (3) with the first end of gas tube (12) from a lower zone in the operating position of the container (1, 10) or from an upper area in the operating position of the container (1, 10) it reaches the gas phase (4) and that the container (1, 10) is formed by a plastic sheet folded and welded at the edges, the tube being welded of gas (3) with the plastic sheet.Recipiente (1, 10) para contener un líquido, en particular un líquido de infusión o líquido de irrigación, con una fase líquida que contiene el líquido (6) y una fase gaseosa (4), estando configurada en la posición operativa en la zona inferior del recipiente (1, 10) una abertura para líquido y presentando el recipiente una abertura para gas, abertura para gas que está formada por un tubo de gas (3), que presenta un primer extremo de tubo de gas (12) y un segundo extremo de tubo de gas (13), llegando el primer extremo de tubo de gas (12) a la fase gaseosa (4) del recipiente (1, 10) y desembocando el segundo extremo de tubo de gas (13) fuera del recipiente (1, 10), caracterizado por que el tubo de gas (3) está conectado de manera no desmontable con el recipiente (1, 10), que el primer extremo de tubo de gas (12) está dotado de un cierre, que el tu
