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'''Spontaneous Fermentation''', for the purposes of this article, refers to the fermentation of wort by inoculating it in a ''coolship'' where the wort is left exposed to the air. Wild yeast and bacteria are introduced into the wort as it cools over night.
==Brewing Methods==
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==Coolship==
[[Coolship]] (Anglicized version of the Dutch/Flemish koelschip) is a type of fermentation vessel used in the production of beer. Traditionally, a coolship is a broad, open-top, flat vessel in which wort cools. The high surface to mass ratio allows for more efficient cooling. Contemporary usage includes any open fermentor used in the production of beer, even when using modern mechanical cooling techniques. Traditionally, coolships were constructed of wood, but later were lined with iron or copper for better thermal conductivity.