The holder rests or attaches to the ledge of a sink and stores a tool such as a toothbrush in an inverted position to drain into the sink basin. The holder includes a base cooperating with a suction cup, a post with at least one notch, and an arm with slots to hold the tool handle. In most cases, a three-walled shield protects the stored tool from splashes or debris created in the sink during regular use. The angle of the tool holder advantageously encourages any liquid debris on the tool to drain away from the tool as it dries during storage. In one example, a toothbrush handle rests in the notch and contacts the arm extending over the sink. The cleaning head, bristles, razor, or other working end of the tool will desirably hang to enhance the hygienic storage of the tool. A cover protects the tool from splashes.