Those look good. If you go by the pic it looks like the silk only with smooth threads on the cap. The silk's have vertical grooves which can make it tricky to keep from cross threading. Although I'm not sure because I don't have anything to compare it to.I put up a Want ad for Cappy bottles and someone suggested these: Boxer BF Replacement Squonk Bottle - Ginger Vaper
7ml. Got one on the way. Also ordered some of those that Doffy recommended.
I just couldn't get myself to pay almost as much for shipping as the bottle for that other Cappy-style.
Keep us updated. If the bottle really is a little taller I'd be interested in getting some.