I claim the ornamental design for a super soft nipple, as shown and described.
FIG. 1 is a perspective view of a first embodiment of a super soft nipple on a drinking container;
FIG. 2 is a perspective view of the super soft nipple thereof;
FIG. 3 is a perspective view of the super soft nipple in a collapsed state thereof;
FIG. 4 is a front side elevation view of the super soft nipple of the first embodiment thereof;
FIG. 5 is a right side elevation view of the super soft nipple thereof;
FIG. 6 is a left side cross-sectional view of the super soft nipple thereof; and,
FIG. 7 is a right side view of the super soft nipple thereof.
The broken line showing the drinking container in FIG. 1 is included for the purpose of illustrating the environment of the claimed design and forms no part thereof.