How about it as a handmade material or antique interior?. They were made at a glass factory in Otaru, a city famous for its canals.
Japanese Antique Glass Fishing Float Balls 9 cm Lot-30 BULK Vintage Retro Japan
Japanese Uki Glass Fishing Floats (BS-JS)
Glass Fish Floats - Ireland
The Glass Floats – Beachcombing Magazine
Authentic Japanese Glass Fishing Floats were made between 1910 and 1980. They were used to float nets and mark traps, and many are still in use today.
Beach-combed Blown Glass Float Balls, 4 diam. (vintage)
Look what I made today! A hand tied glass fishing float net! – Ruth Bleakley's Studio
Glass Fishing Floats
Pond Floating Balls
YOU WILL RECIEVE - 3 Pack of 3 Aqua glass floats with jute rope. These glass floats are perfect for beach home decor or adding a nautical feel to
Japanese Glass Fishing Floats Ball - 3 Aqua (3 Pack) - Glass Buoys with Rope - Japanese Glass Floats - Fishing Float Glass - Glass Float Balls