Decorative Mana Potion

It counts as a placed bottle for alchemy, so a row of these along a shelf gives you a working potion bench that looks like an apothecary rather than a pile of empty glass. Pair it with the red flask if you want both colors on the same table.

Mining one that generated in the Dungeon hands over a Lesser Mana Potion, not the decoration, so early on it is worth swinging at every shelf you pass. Clicking it no longer picks it up, which trips people who remember the old behavior.