Closure for a Container, Beverage Container and a Method of Operating a Closure

A method of operating a closure for a container comprising:

• providing a beverage container having a closure comprising an outer portion connectable to an opening of the container, an axially actuatable inner portion having a sealing member for restricting fluid flow through the closure with the inner portion in a first position and allowing fluid flow through the closure with the inner portion in a second position axially displaced relative to the out portion;
• and an annular membrane connecting the outer and inner portions and configured to provide a returning force to resiliently bias the inner portion towards the first position such that the returning force is lower with the inner portion located at the second position relative to the first position;
• and
• actuating the inner portion relative to the outer portion to thereby open a valve comprising the sealing member and allow passage of fluid from within the beverage container through an outflow orifice, past the sealing member and out of the closure through a drinking opening.