I actually don't think it's possible to change the acid bottles to the same way arrows work atm. (So I've heard. never tested it myself..). I agree with lowering the cost and perhaps even removing their weight. Considering merchant classes are supposed to be able to carry more supplies compared to other classes. Yet almost all classes got enlarge weight limit and those classes do not require to carry a ton of bottles with them to be effective. Most of the time a real duel can take up to 2k bottles. which means carrying 4k bottles in total (acid/grenade) this also means 4k weight which is pretty much 50% already even if you have a hybrid strength build. In other words other classes can carry more yggs and supplies compared to the chemist. I don't think saying "But you have a cart" is anywhere near valid considering @storage is enabled in nearly all places.