This is Binggrae's the Banana Flavored Milk! This is Korean version packaging of the milk. I'm not sure how many non-Korean would have tried this, but this is one of the 'traditional' Korean drink and its popularity has been going strong even after 35 years. A lot of Koreans have nostalgic childhood memory of this milk since most Koreans went to public bathhouse/sauna regularly and right after the nice hot bath I'm sure many people made it a ritual to drink this Banana Milk.
As you can see the packaging is itself is very interesting and easy to remember.
I visited Binggrae's site and they say that the original bottle design was inspired by Korean traditional jar called Hanggari like below.