The ornamental design for a beveragecontainercap, as shown and described.
FIG. 1 is a first top perspective view of a beverage container cap showing our new design.
FIG. 2 is a second top perspective view of the beverage container cap of FIG. 1.
FIG. 3 is a front elevation view of the beverage container cap of FIG. 1.
FIG. 4 is a back elevation view of the beverage container cap of FIG. 1.
FIG. 5 is a left-side elevation view of the beverage container cap of FIG. 1.
FIG. 6 is a right-side elevation view of the beverage container cap of FIG. 1 in a position of use.
FIG. 7 is a top plan view of the beverage container cap of FIG. 1; and,
FIG. 8 is a bottom plan view of the beverage container cap of FIG. 1.
The dashed lines and the areas within them in FIGS. 1-5 and 8 depict a threaded lower portion of the beverage container cap that forms no part of the claimed design. The dashed lines and the areas within them in FIG. 6 depict the environment of a container that forms no part of the claimed design.