[Webcomic] MSPA: Let me tell you about Homestuck...

 Spoiler

I said blood because it seems the color matches with the hemospectrum of the trolls that are dead + The description of those bottles could possibly apply to the dead trolls. Also remember Gamzee has the head of every dead troll (Cept the ghost girl) so its no suprise if it was actually blood

Oh I know, hence the Hussie logic statement.

 Spoiler

People were spazzing out about how they thought the coffee the kids were drinking was actually blood. I still standby my statement that he's just selling Faygo =p.