We claim the ornamental design for a roll-up gel pack for test tubes, as shown and described.
FIG. 1 is a perspective view of a roll-up gel pack for test tubes embodying the invention.
FIG. 2 is a front view of the roll-up gel pack for test tubes shown in FIG. 1.
FIG. 3 is a left side view of the roll-up gel pack for test tubes shown in FIG. 1, the right side view being substantially identical thereto.
FIG. 4 is a top view of the roll-up gel pack for test tubes shown in FIG. 1, the bottom view being substantially identical thereto.
FIG. 5 is a perspective view of the roll-up gel pack for test tubes shown in FIG. 1, illustrating test tubes inserted thereto; and,
FIG. 6 is a perspective view of the roll-up gel pack for test tubes shown in FIG. 5 in a rolled-up configuration.
The broken lines showing the environment form no part of the claimed design. It is to be understood that the roll-up gel pack for test tubes is filled with a deformable gel-like substance and that subtle variations in the surface contours are to be expected.