Yes and no. Yes you can score a glass bottle with it but no it's very hard to do freehand. To cut bottles effectively you need a roller stand and a stationary cutter, not a freehand cutting tool such as this. A roller stand can easily be made from four small fixed casters mounted to a board (both available at Homedepot). Hobby shops may also stock bottle cutting kits.
You cannot cut tempered glass with any type of glass cutter. Once tempered the glass will shatter into cubes if you try.
No, it is for glass only.
Bottles are difficult to cut with a hand tool because you can't easily hold the tool in position and rotate the bottle freehand. There are roller jigs that will hold a round object in place so you can rotate it easily. Even with a roller jig the cutting tool needs to be held firmly in place. I believe there was a bottle cutting fad in the 70's from, maybe, Ronco?, where they sold a jig to do this. I vaguely recall making a set of glasses from Michelob glasses when I was a teen (I'm >60 now).
Yes. It will cut any common glass. There may be some chipping on the edges of the silvering.
They are for holding the edge of the glass when snapping after scoring.
Best to get a tile cutter
For me do not buy this one because it đi not work at all.