The sweet lime, known across South Asia as mosambi (or musambi) and in the Middle East as limu shirin, is a low-acid citrus grown almost entirely for its juice. Green-to-yellow and lime-like on the outside, it is startlingly mild inside — gently sweet, faintly floral and almost devoid of the sharp tartness that defines other limes. Pressed fresh at roadside stalls from Delhi to Cairo, its pale, refreshing juice is one of the great everyday drinks of the tropics, prized as much for being easy on the stomach as for its flavour.