Guess what? I found out what it is for you!!!! I posted a picture on my Facebook page to see if anyone could figure it out. There's actually one listed on ebay for sale right now.
This is what the posted one says:
For you consideration one new LIGHT TAN MANICURE HELPER
An indispensable tool fits in your hand comfortably
makes giving yourself a manicure easy and neatmight work for decorating cake icing too
Approximate measurements: 4 1/8" wide at bottom 3 1/8 high