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. "It's very refreshing and it cools me down. The Rooh Afza enhances the taste of watermelon," says one customer at a roadside stall in Karachi, who had travelled seven kilometres just for the drink. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES