Pakistan and India have fought three wars and countless skirmishes, but as summers get hotter with climate change, their people are united by love for a cooling 115-year-old pink libation with a secret recipe.

The ultra-sweet concoction of herbs and fruits, Rooh Afza -- which translates as "refresher of the soul" -- has not only survived the 1947 partition of the two countries but thrived on both sides of the border.