I hope the South Koreans will forgive my ignorance and bad joke but the Korean Air circle for the "O" made me think it could pass for them pushing for Pepsi. Then I thought, thinking of the Japanese flag, it likely comes from the Korean flag. Yep, the Ying-Yang.
DRINK PEPSI. COKE IS RED BECAUSE IT IS COMMUNIST.
Korean Air proudly serves Pepsi products.