Portable Drinking Device

FIG. 1 is a left, front perspective view of a portable drinking device, shown in environmental use, showing my new design; FIG. 2 is a front view thereof; FIG. 3 is a rear view thereof; FIG. 4 is a right-side view thereof; FIG. 5 is a left-side view thereof; FIG. 6 is a top view thereof; and, FIG. 7 is a bottom view thereof. The broken lines in FIGS. 1 - 7 show portions of the drinking device and form no part of the claimed design. The broken lines forming the can in FIG. 1 are for the purpose of illustrating environment only and form no part of the claimed design.