| CPC B65D 17/506 (2013.01) [B65D 47/286 (2013.01); B65D 2401/15 (2020.05); B65D 2517/0046 (2013.01); B65D 2517/0091 (2013.01)] | 33 Claims |

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1. A closure system for a container for liquids or bulk material, the closure system comprising:
a lid, wherein the lid comprises an upper side, a lower side and a drinking orifice;
a closure member for closing the drinking orifice, the closure member being positioned at a lower side of the lid and configured to cover an entire surface of the drinking orifice in a closed position;
an operating member for manually opening the drinking orifice by a user, the operating member being positioned at the upper side of the lid and connected to the closure member; and
at least one recess defined in the lid and disposed relative to the closure member such that, when the closure member is moved from the closed position via the operating member, the at least one recess is at least partially overlapped by the closure member such that a gas exchange occurs between an interior of the container and an environment.
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