I didn't want to hijack a thread (if that's even possible around here), so I thought I'd start another one. I imagine pictures of other drip tips can be posted as we collect them. This is the Black Rainbow tip I just got. It must have a groove for the o-rings to fit in, but they are very tight and I'm not going to mess with them. I didn't notice it has a couple of little bubbles until I took the picture. I can't feel them. This is a lampwork tip. There is a much larger groove for an o-ring (the bottom is on the right). I took the o-ring out because it kept getting stuck in cartos and the bottom is wide enough that it doesn't slip out anyway. Drip tip o-rings come in different thicknesses and I have a feeling this one had the wrong size when I got it. I've seen a number of vendors who sell glass tips purposely without o-rings. I've also seen a couple that sell a thingy that looks sort of like a carto, which a blown glass tube slides over. Upside down you can see that the bottom is wonky, but it doesn't affect performance. It's also pretty unnoticeable unless you're taking pictures. The two glass bottoms side-by-side This is a Sodalite TruStone tip. TruStone is real powdered stone mixed with an acrylic resin, then hand-turned around a metal tube. It's the same material high-end pens are made of, so if you go to a pen-making site you can see "blanks" of the colors available (there aren't many). The sites also have acrylic blanks in lots of different colors that can be used to make tips. Tommy @ Mr. Vape, who made this one, said he would make any shape or color we can find. His prices are in-line or better than other vendors making similar tips.