The ornamental design for a beveragecontainer, as shown.
FIG. 1 is a perspective view of the beverage container according to a first embodiment of the invention;
FIG. 2 is a top plan view of the beverage container according to the first embodiment of the invention;
FIG. 3 is a front elevation view of the beverage container according to the first embodiment of the invention;
FIG. 4 is a side elevation view of the beverage container according to the first embodiment of the invention;
FIG. 5 is a perspective view of the beverage container according to a second embodiment of the invention;
FIG. 6 is a perspective view of the beverage container according to a third embodiment of the invention; and,
FIG. 7 is a perspective view of the beverage container according to a fourth embodiment of the invention.
The broken lines in the drawings showing the beverage container illustrate the portions of the beverage container that form no part of the claimed design.