I've been very curious about the wine bottles, because the blood on Labrys had a similar color, as well as its miraculous healing properties. I think there was mention of the labyrinth reacting to the ichor in Asterion, and I've been wondering what happens if the Master shares that blood. Asterion points out that no master has partaken in that special wine, and he does offer you a drink before taking it all himself... I can't remember which time that was. But blood is definitely a key component of the story.
They did describe the 'obsidian' crystals and wine to be purple-colored, huh? Come to think of it, I now wonder what the prerequisites/conditions are to make Asterion's spilled blood to remain as a liquid rather than harden. Asterion has been bled out in the dark room for decades after all. The only instance when this did happen and mentioned was in the past when Laomedon trained with him. Even in the much recent goring of Asterion in the ruthless route, it wasn't shown (and he only bled red in his sprites?).