1 1/2 tablespoons white sugar, or to taste
2 fluid ounces cachaca (Brazilian rum)
Cut off the lime ends with a sharp knife; discard. Slice lime in half; remove white pith from the center. Slice into 6 wedges.
Place lime wedges skin side down into a glass; add sugar. Mash with a cocktail muddler, bruising the skin slightly. Stir in ice and cachaca.