Northern Brewer: Buy Three Session Extract Kits… Get a Free Bubbler Fermenter! Buy Three Session Extract Beer Kits (Available Selections) and get a Free 5 or 6 gallon Bubbler Fermenter. That’s a savings of $24.99 (if you choose the 6 gallon Bubbler). The whole order also qualifies for Flat Rate Shipping. Check it out – Here More: Our Last Fifty Finds!