The ornamental design for an adjustablebeveragecontainersleeve, as shown and described.
FIG. 1 is a perspective view of an adjustable beverage container sleeve showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a right side view thereof;
FIG. 8 is a perspective view thereof in a first operational mode; and,
FIG. 9 is a further perspective view thereof in the first operational mode, here showing an illustrative beverage container for environment.
The broken lines are for illustrative purposes only and form no part of the claimed design. Specifically, the broken line showing of a beverage container in FIG. 9 represents environment. All other broken lines represent unclaimed portions of the article.