How to cut a glass bottle with a bottle cutter
Updated: October 2026
You already have a plate jig and a round wine or beer bottle, and the listing photo looks finished. How to cut a glass bottle with these kits is one score, a hot-then-cold shock, then wet sanding. A second lap, dry sandpaper or a square bottle is how the glass leaves the line. This is procedure only; the [bottle cutter comparison](/hub/cutting-tools/bottle-cutter) is the product table. Peter F., the DIY & tools editor, read the listings, Sen5es, Eternal Tools and HSE dust guidance. A qualifying purchase can earn a commission at no extra cost to you.
You already have a plate jig and a round wine or beer bottle, and the listing photo looks finished. How to cut a glass bottle with these kits is one score, a hot-then-cold shock, then wet sanding.
You already have a plate jig and a round wine or beer bottle, and the listing photo looks finished. How to cut a glass bottle with these kits is one score, a hot-then-cold shock, then wet sanding. A second lap, dry sandpaper or a square bottle is how the glass leaves the line. This is procedure only; the bottle cutter comparison is the product table. Peter F., the DIY & tools editor, read the listings, Sen5es, Eternal Tools and HSE dust guidance. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Support wheels | Spare blade | Gloves | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Camdios Camdios bottle cutter kit | 5 | Yes | Yes, no cut rating | 7.8 | about £21.97 | View offer |
 Kalawen Kalawen original bottle cutter | 5 nylon rollers | Yes | Yes, no cut rating | 8.6 | about £25.48 | View offer | |
| Alternative |  Kalawen Kalawen neck bottle cutter | Five-wheel structure | n/a | Yes, no cut rating | 8.0 | about £22.99 | View offer |
On this page
Set the jig so the line can meet
Lay the plate on a stable bench. Sit the bottle on the rollers so it cannot skate sideways. Set the stop and the arm so the wheel sits at one height for a full rotation. Kalawen original’s UK reviews describe a flexing back plate; Camdios reviewers report skating plastic wheels and height holes that do not line up. If the bottle rocks, stop and reset. A line that fails to close will not be saved by water.
Use a straight-sided round bottle. Square, oval, embossed and thick champagne bottles are abort cases. Kalawen neck adds a claimed neck guide. For a body cut, lock one height on the wall of the bottle. Gloves in the box have no cut rating. Put on impact eye protection before you score. BS EN 166 marking F is low-energy impact; ordinary spectacles are not that. Buying checks for a flexing plate sit on the bottle cutter buying guide.
One score, then shock
Sen5es says one light even score. Eternal Tools says one continuous score. Do not run a second lap. A second score is the usual way the crack leaves the line. Medium pressure, as Kalawen original’s bullets put it, means a visible frost line that meets itself. If it does not meet, abort that bottle.
Then shock the score. Kalawen original’s bullets say boiling water and cold water three times, each for more than 40 seconds. Sen5es says water around 90°C rather than a rolling boil, then the cold tap. Those are published methods, not a laboratory temperature. Keep your face out of the splash. Reviews of the Kalawen neck kit describe glass exploding when cold water is poured. If the crack runs off the line, that bottle is scrap. UK reviews of Kalawen original say the first bottles are often scrap.
Wet-sand the fresh edge
The edge is sharp as soon as it separates. Sen5es warns that dry sanding puts glass in the air. HSE says water has to be present the whole time dust is made. Sand under water. The two kit sheets take the wire edge off a vase or candle holder. They are not a drinking rim.
Wear the eye protection again while you sand. One Kalawen UK review spent about an hour on a tumbler with finer grit after the kit sheets ran out. That is a time signal, not a lip. If someone will drink from it, the limit sits on cut a wine bottle into a drinking glass. Do not call the sanded edge food-safe. No UK food-contact approval was found for these kits.
When to abort the bottle
Abort if the bottle is square, oval, heavily embossed or a thick champagne you could not set. Abort if the score does not meet after one pass. Abort if the glass is thermally toughened. BS EN 12150-1 forbids cutting or edge-work after toughening. Pilkington UK says that glass is processed before toughening and breaks into small fragments. Shower glass, oven glass and car glass are out.
Abort to a glass shop if the rim will touch a mouth, if you want a flame-polished lip, or if the bottle is laminated. ASE describes flame-polishing for small laboratory tubing, not a 700 ml wine bottle. The first bottles as scrap is normal in Kalawen original’s UK reviews. If the jig will not hold a closed line on a round bottle, you are back on the comparison table.
Common questions
How many times do I score the bottle?
Once. Sen5es and Eternal Tools both describe one continuous pass. A second lap starts a second track and the crack leaves the line. If the frost line does not meet, abort that bottle rather than going round again.
How hot should the water be?
Kalawen original’s bullets say boiling water and cold water three times, each more than 40 seconds. Sen5es prefers about 90°C rather than a rolling boil, then the cold tap. Both are published methods. This page does not pick a laboratory temperature. Keep your face out of the splash.
Why did the crack leave the line?
Usually a second score, a bottle that rocked, a flexing stop, or a shape the jig cannot hold. Square, oval, embossed and thick champagne bottles are common misses in these reviews. Reset the jig for the next round bottle; do not chase the crack with another wheel pass.
Do I need eye protection if gloves are in the box?
Yes. Kit gloves have no cut rating and no eye rating. Wear impact eye protection. Ordinary glasses are not BS EN 166 F. From 11 November 2025, BSI says new certificates move to EN ISO 16321-1. Reviews include exploding glass on cold water and a cut on sheet-metal edges.
Can I sand dry with the two sheets in the kit?
No. Sen5es says dry sanding puts glass in the air. HSE wants water present the whole time dust is made. The two kit sheets are a wet start for a craft edge, not a dry polish and not a drinking lip.
Will this work on a champagne or square bottle?
Not as a method you should plan around. Listings name champagne; UK reviews of Kalawen original say only straight-sided bottles work, and Kalawen neck failed a square bottle. Treat those shapes as abort cases.
What do I do if the score does not meet?
Do not score a second track. Check whether the back plate flexed or a wheel skated, then use another round bottle. If a closed line is impossible on a straight-sided round, the jig is not holding and you are shopping again, not sanding.
Related pages
Sources
Public UK sources used for this comparison. Listing prices, stars and review counts are the amazon.co.uk figures saved for this set on 19 October 2026.
- Sen5es — how to cut glass bottles in half (retrieved 19 October 2026)
- Eternal Tools — how to cut a glass bottle (retrieved 19 October 2026)
- General Product Safety Regulations 2005 (retrieved 19 October 2026)
- Consumer Rights Act 2015, section 11 (retrieved 19 October 2026)
- HSE — construction dust FAQ (retrieved 19 October 2026)
- Pilkington — toughened glass (retrieved 19 October 2026)
- BSI — EN ISO 16321 eye protection (retrieved 19 October 2026)
- Salvage Sister — bottle cutter kit (retrieved 19 October 2026)