Look at the ruler. Because the stone's bowl is only about 1.5-inch wide, I think it's more likely made to hold paperclips than a cigarette.
But at that size, it couldn't hold more than a few paperclips. So it was probably made for some other purpose. I suspect the specific breed of dog, which on both of the objects posted (thanks, DCMatt) is a Scottish Terrier, suggests it perhaps held a Golf ball.
That is just a guess. (Note the word "perhaps".) But of course, my guesses have occasionally been wrong. Which is why I very rarely post a guess in this forum. ;-)