The ornamental design for a beveragecontainer, substantially as shown and described.
FIG. 1 is a front view of a beverage container comprising a new, original and ornamental design with the rear view being a mirror image thereof;
FIG. 2 is a right-hand side view of the beverage container comprising the new, original and ornamental design with the left-hand side view being a mirror image thereof;
FIG. 3 is a top view of the beverage container comprising the new, original and ornamental design; and,
FIG. 4 is a bottom view of the beverage container comprising the new, original and ornamental design.
The broken lines shown in the drawings illustrate unclaimed portions of the article and form no part of the claimed design.