The Bubbler represents a refined approach to a plastic fermentation vessel. A six gallon total capacity carboy, it takes a #10 stopper or universal PET bung.Perfect for either primary or secondary fermentation of home brew beer, homemade wine, cider, and mead. Narrow neck eliminates excess headspace during secondary fermentation. Plastic construction is lightweight and will not shatter when dropped.The Bubbler is also available in 5 Gallon capacity.