I literally meant that there was no such thing as a water arrowhead object. No icon, no stats, no nothing. A lot more work than just a recipe would need to be done. Of course this means that my original suggestion for the freezing arrowhead recipe is not possible, so perhaps essence of air with a regular arrowhead?

Fire arrowheads plus barrels of oil or cup of oil equals an explosive arrowhead right now. You be changing those recipes so they don't conflict with Dave's suggestion smoke arrowhead? Fire arrowhead plus water equals steam right now.

Perhaps we can just use regular empty bottles as potion flasks? No need to put them in the oven.. I agree with the fact that there are enough potion flasks already.