There is a BrüBox which allows you to brew your own craft beer at home.
What's the estimated alcohol percentage you can achieve by using the provided equipment and following the instructions from the BrüBox brewing kit?
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I agree with barking.pete
They don't mention anything on their website except that you can choose from Porter, Session IPA or Weissbier. Based on my experience with Cooper's Kit, they usually are just below 5%. However, my local brew store make their own kits that are between 4.5% and 8% depending on the type of beer, so it is a possiblility.
You can always increase alcohol by adding sugar or add some malt (since it seems to be an all grain kit, requiring a mash).