I've been meaning to say something, but keep forgetting. Several months ago I picked up a small bottle of cinnamon e-juice to find out if it would react with cast acrylic. That's the material that I make my cartomizers from.
I put some of the juice in one of my old obsolete cartomizers and left it there for several weeks. It did not damage it in the least. This did not surprise me. I thought this would be the case two or three years ago, but never had the chance to test it.
A good number of cartomizers sold today use this material, but they don't tell you so. However, if they tell you that it is safe to use with problem juices or something like that, then that's what it is. I'm glad to finally see it happening.
Cast acrylic weighs half as much as glass and cools quicker. It's not as hard as glass, but it's safer to use. I think a lot of drip tips are made out of this stuff, but don't quote me on that.