Disc With Holes
Sometimes you may find something that looks absolutely mundane but you just know there has to be more to it than meets the eye. The OP’s uncle found this clear plastic disc with holes and had no clue what it was for. Is it an ashtray or something that’s purely decorative? The OP decided to turn to the internet to solve the riddle and voila.
It is actually a “flower frog” that Is used to arrange flowers in a particular manner. Usually, they fit into a vase or bowl and keep the flowers from moving so that your arrangement can stay intact. Second question…why is it called a flower “frog?”