if it came in a green or brown bottle That's pretty easy. Green or clear bottles taste more skunky because of the mercaptans (iirc) that form from a reaction w

if it came in a green or brown bottle That's pretty easy. Green or clear bottles taste more skunky because of the mercaptans (iirc) that form from a reaction with the light. That's why it's typically in brown bottles and why corona tastes so bad.