The ornamental design for a device for holding bathtoys, as shown and described.
FIG. 1 is a perspective view taken from the top, front, and left side of a device for holding bath toys in accordance with the present invention.
FIG. 2 is a front elevational view thereof.
FIG. 3 is a rear view thereof.
FIG. 4 is a left elevational view thereof.
FIG. 5 is a right elevational view thereof.
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The dash-dash broken lines illustrate portions of the device for holding bath toys. The dash-dot broken lines represent the bounds of the claim. The broken lines form no part of the claimed design.