Sure bring the beer. But as previously stated it doesn't hurt to state that you have personal brewing experience, but emphasize your excellent work ethic, eagerness to learn and supreme desire to help brew HIS/HER product the way he/she wants it done. Unlikely you'll be teaching them anything new so the home experience aspect is a good, but not a ticket in.
If the opportunity arises share your brew- more as an example that you understand the process. Don't divulge that it was a Cooper's kit...
Most importantly, bring some humility
along to back up that bravado
. In my field of expertise a somewhat experienced egotistical colleague with just barely a year in got herself sidelined by being too cocky with the management. Recently, when she desperately needed a transfer- she ultimately didn't get the job; her position was filled by a new hire
and she now works about 7 hours filling in a hole here or there. I think they expected her to quit...
What does that have to do with getting an entry level job in a brewery? I think many would prefer to train and mold their new hires, whereas "experience" can sometimes bring discord to the workplace depending on personality. So come to the interview ready to work immediately.