Lime is more commonly used in Sri Lanka than lemons. This is a drink for summer days usually but I do have it in winter as a mixer.
Large bunch of lemon/pineapple/chocolate mint
4/5 limes, juice and zest
sugar to sweeten and ice
Blitz all the ingredients (apart from the zest) in a blender and pour into a jug.
Serve on more ice and garnish with the lime zest.