Portable foldable water bottle

FIG. 1 is a perspective view of a portable foldable water bottle showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is an enlarged perspective view thereof in a folded state.

The broken lines in the drawing depict portions of the portable foldable water bottle that form no part of the claimed design.