Karben4 is encouraging beer drinkers to check their bottles as part of a voluntary recall.
The Madison brewery was notified by its bottle manufacturer of a defect in a "very small quantity of specific bottles" that can cause a loss of carbonation and a small piece of glass potentially breaking off inside the bottle. The recall involves beer bottled between June 6 and June 22 with a molded 7 on the bottom of the bottle.
"If you have a '7' bottle, the next step is to look at the laser etched code on the bottom edge of the bottle. This laser-etched code is 13 digits long. If the fifth through seventh digits are '149' and the bottom of the bottle is stamped '7,' then you have an affected bottle," Karben4 said.
Another way to check is find the "Bottled On" date on the neck of the bottle.
The affected styles and dates are: Fantasy Factory bottled June 6, 13, 20 and 22; Lady Luck bottled June 15; Dragon Flute bottled June 13; Block Party bottled June 8 and 17; and Idiot Farm bottled June 8, 15 and 20
Unopened bottles can be brought to the Karben4 taproom, 3698 Kinsman Blvd., for either a $10 refund, a free growler and fill, or a t-shirt. Otherwise, affected customers who can't make it to the taproom can email the brewery at firstname.lastname@example.org or message on Facebook.