The ornamental design for a mobilestackabletower, as shown and described.
FIG. 1 is a front, top perspective view of a mobile stackable tower;
FIG. 2 is a back, bottom perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a back elevation view thereof;
FIG. 5 is a left-side elevation view thereof;
FIG. 6 is a right-side elevation view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof; and,
FIG. 9 is a front, top perspective view of the mobile stackable tower according to the present design.
The broken lines shown in FIGS. 1-9 illustrate portions of the mobile stackable tower that form no part of the claimed design. The additional broken lines shown in FIG. 9 illustrate environment that forms no part of the claimed design.