hello everyone, so my dad started vaping a few years back and bought two very odd bottles of unbranded e-juice (no idea where did he get it from), he stopped vaping a very short time after he started and he didn't throw the bottles away, now I am starting to vape and my question is, is this juice "safe" to vape? because I saw a lot of e juices on the net and there writing the PG/VG ratio, nicotine amount etc, so do you recommend me to use that juice or just throw it away?