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;
FIG. 2 is a front elevation view of the roll-up gel pack for test tubes shown in FIG. 1;
FIG. 3 is a left-side elevation view of the roll-up gel pack for test tubes shown in FIG. 1, the right side view being a mirror image thereof;
FIG. 4 is a top plan view of the roll-up gel pack for test tubes shown in FIG. 1, the bottom view being a mirror image thereof;
FIG. 5 is a perspective view of the roll-up gel pack for test tubes shown in FIG. 1; the broken lines illustrating test tubes inserted thereto, and forming no part of the claim; 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.