Originally Posted by tdq

Sure! The one on the left was a gift - one side is actually rough!! - I never, ever use it. The ceramic mudslide was my favourite for a long while, I liked to use it on my reso. Two brass slides from when I first started playing slide but now I find them bulky and heavy. The two darker glass were cut off red wine bottles but the flare at the base is a bit big and the "seam" where the glass mold is joined is kind of annoying. I finally found a brand of vinegar bottle where they don't flare out, and the seam is less pronounced, so the glass ones are all from that ("Moro" brand here in Australia). I cut them with a dremel and then do some grinding and wet sanding. Probably 75% success rate but one is enough!
The only drawback is they are still a tiny bit short for me but work well in most cases. If I need to do full 6 string bar chords on the reso I'll use the Mudslide but most of the time the glass ones work great.
The lapdawg tonebar is for when I'm playing my weissenborm.