Vintage 1970s Acrylic Nature Napkin Holder

Vintage 1970s napkin holder, clear acrylic with bits of lentils, corn, wheat, dried flowers and butterflies encased within the acrylic mold. There is a sticker inside but it is too faded to read. Measures 4.5" tall by 4.5" wide by 1.75" deep (the part that holds the napkins)