The ornamental design for a toothbrushholdingdevice for a toothpaste canister, as shown and described.
FIG. 1 is a perspective view of a toothbrush holding device for a
toothpaste canister showing my new design therefor. The broken line
drawings representing a toothpaste canister and a toothbrush are for
purposes of illustration only and form no part of my design;
FIG. 2 is a top plan view;
FIG. 3 is a front elevational view, the rear elevational view being a
mirror-image thereof;
FIG. 4 is a right side elevational view, the left side elevational view
being a mirror-image thereof; and,