I jsut received my sachets in the mail, 20mL of Sust and 20mL of tren a. I am so psyched. I opened the package and sure enough there are 8 5mL sachets, just as I intended. Then it came to me, how do i know which is the sust and which is the tren? I have not opened the sachets yet because I want to be certain before I transfer to a vial as I do not want to mix the 2 compounds. Anyone know how to tell a difference? Are the oils different colors?