Sunset Sarsaparilla deputy badge

 is a miscellaneous item in Fallout: New Vegas.

Characteristics
The Sunset Sarsaparilla Deputy Badge is the prize awarded to those who can get at least 51 Sunset Sarsaparilla Star Bottle Caps and give them to Festus to claim their prize. All of them are in a vault inside the Sunset Sarsaparilla Headquarters behind a door that only unlocks after giving the caps to Festus. In total there are 312 Sunset Sarsaparilla Deputy Badges, including the one that can be obtained by moving Allen Marks' body.

The Sunset Sarsaparilla Deputy Badge is completely weightless and worthless as far as I've discovered.