The American Homebrewers Association is offering a free packet of White Labs yeast for homebrewers who become members of the AHA through this website in October. Click the AHA ad on our site — it’s the yellow one that says, “Join Now” — and enter the promotional code YEAST15 when you sign up for an AHA membership. They will send you a coupon for a free packet of White Labs PurePitch yeast at the end of the month. Your membership includes a subscription to Zymurgy magazine, and all the other benefits the AHA. Navigating to their site via the ad on our page also benefits this website as well. Thank you for your support.