
- a small wine bottle (the single-glass size)
- wet tile saw
- grinder
- dremel with diamond bits
Cut the bottle into approx. 35mm rings (you'll get two out of one bottle). Smooth edges on edge of tile saw and grind. Use the dremel to engrave a motif of your choice (if you're artistically challenged, you can stick a sticker on the inside and trace it from the outside).