Diesel Brew is cold brewed for 14 hours in brewing tanks. After brewing, they filter twice and then bottle in glass and aluminum 12oz bottles, 64oz Growlers (called Large Marge) and also offer 5 gallon kegs (Diesel Brew Tankers) for home and office service. After brewing the grounds are pressed then the diesel brew is filtered and bottled. They do not yet offer IV bags.
Sample their wares at WordCamp and check them out here.