Canadian design studio Castor Canadensis have made the latest, greatest use of an old shipping container with "The Sauna Box," and for just $41,000, it can be yours. The sauna is a traditional wood-burning, water tight steam bath with a wood fired stove powered by solar panels. It's built with materials like Corten steel, which are meant to endure saltwater and other varying environments. Want to bump music while you get your steam on? It also comes with an iPod stereo and an electric guitar hook-up.

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[via DesignBoom]