Flasks with cork-valve

Cork-valve

— stopper equipped with a valve for quick access to the contents of the container. At the same time, the cork itself is most often attached to the thread, but it does not need to be unscrewed and tightened every time: just open the valve — and you can safely drink or drain the contents. At the same time, valves can have a different design, but most often they open and close with just one movement — an indispensable feature for frequent drinking on the go. But for long-term storage of liquids, such plugs are worse than screw ones.