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...arily of [[methane]] but including significant quantities of [[ethane]], [[butane]], [[propane]], [[carbon dioxide]], [[nitrogen]], [[helium]] and [[hydrogen

...d a long, slender, ergonomic design with a window showing the level of the butane fuel. With its adjustable flame, the MPL was designed to light candles, lan ...e range of Zippo products. Concurrently under development was a refillable butane pocket lighter aimed at customers not enamored of the smell or messiness of