Hmm—let’s carefully analyze your description:
- Made entirely of glass
- Narrowed openings all around the perimeter
- Found at a grandmother’s house
This sounds like a glass flower frog.
What a Glass Flower Frog Is
- A small, heavy glass piece used in floral arranging.
- The narrow openings are holes to hold flower stems in place.
- Placed inside a vase or bowl, it helps flowers stand upright and arranged neatly.
- Common in vintage and antique collections—your grandmother may have used it for fresh-cut flowers.
💡 Tip:
- If it’s weighted, it’s almost certainly a flower frog.
- Other possibilities could be a vintage glass perfume bottle insert or a decorative salt cellar, but the multiple openings around the perimeter strongly suggest flower arranging use.
If you want, I can show a few images of vintage glass flower frogs so you can compare and see if that’s exactly what you have. Do you want me to do that?