Off Topic What’s this knife/sheath sitting on?

^this is gonna be bang on. 👏
You know WW it's a mystery to me why these things even exist or why any woman would use them but alas, my wife enjoys a bit of color on her toes every now and then. These were just sitting there and I thought 🤔 "they'll either get it right away or never". 😀 Coleman did not disappoint.
I just use cotton balls when I do mine...😂
This has got me stumped…it can’t be that large considering the size of the knife on it…hmmm.
Is it a dog toy of some sort? I don’t see bite marks so I’m guessing that’s a wrong guess.