The ornamental design for a beveragecontainer, as shown and described.
FIG. 1 is a front perspective view of the beverage container of the present design;
FIG. 2 is a front perspective view of the beverage container of the present design, with a cap member removed from an orifice in the container; and,
FIG. 3 is a rotated front perspective view of the beverage container illustrating a potential use of the beverage container, to pour a fluid from the beverage container into a cup or other receptacle.
The broken line features shown in FIG. 2 form no part of the claimed design. The cup shown in broken line in FIG. 3 is included for the purpose of showing a potential use of the beverage container, to pour a fluid from the beverage container into a cup or other receptacle, and forms no part of the claimed design.