Empty Dropper

The empty one does nothing on its own. Filling it needs a Crystal Ball with the right liquid nearby, and whichever liquid is next to the ball decides which dropper comes out. Most people learn this after hauling the ball somewhere convenient and dry.

Build one spot that has everything: the Crystal Ball, with small pools of water, lava and honey a few blocks apart around it. Bring buckets. Once the station exists you can convert as many droppers as you want in a single visit, and the Wizard charges so little that there is no reason to buy them one at a time.