When I got this swap the liquid was green. The tag says “Girl Scouts Bleed Green” It’s a medical vial. No idea what’s actually in it. – UPDATE: Kathy (the maker of the swap) sent me an email. The green blood was water and food coloring. A few of the vials might have mixed with a bit of residue from the original contents to turn it blue. She retaged as “Jungle Fever Vaccine” for a later event.