Volcano Lemon Burst comes directly from the lemon groves near the Mt. Etna Volcano in Sicily, on the Mediterranean coast. In 1965, two friends native to the island decided to capture the unique flavor of their organic lemons for the world to taste. They developed an exclusive compartment on top of the squeeze bottle, containing the zest of the lemon oil from the peel. The lemon oil adds an additional zesty burst of flavor, as well as a fresh aroma, to each squeeze.