Here in Brazil, all supermarkets sell small frozen packets of fruit pulp - no sugar, no sweeteners, no preservatives. Just pure pulped fruit, and meant to be popped into the blender with water to create fruit juices. The variety is enormous - guava, mango, passion fruit, pineapple, tangerine, lime, graviola, acerola, açaí, caju, cajá and on and on. A couple of weeks ago, I decided to try blending one of these packets of pulp, undiluted, with a good shot of cachaça in an attempt to create a frozen caipifruta. It worked marvelously, and has become my new favorite quick cocktail. I'm slowly working my way through the variety of fruits. Some particular favorites so far are tangerine and passion fruit. Maravilhoso! Note: some fruits do require the addition of sugar to taste.