Not that I have ever been to prison but here is a recipe for champagne you could make in prison if you ever need one.
This recipe is for 10 litres which may be difficult to hide but that would be your problem.
Get 10 litres Frisfruit juice from Lidl. It is only 85 cents for 1,5 litres so that should not be a problem. (It contains 110 grams sugar/litre. It is made of concentrated grape/apple/lemon. You're in prison ok? Don't expect the real thing!)
700 grams sugar
32 grams Citric acid (Or lemon juice if that is easier to get)
tsp Yeast nutrition (just to keep the yeast happy. Maybe not even necessary)
Let this ferment until it stops. Now you have a white wine which has maximum 11% alcohol in it. Probably a little less due to evaporation.
You can drink this but if you have something to celebate sorry celebrate you can make it in to Prison champagne as follows:
Rack it into another 10 litre bottle in which you have put 250 grams sugar. You don't have to be very carefull because you would want to have some living yeast in there.
Immediately after racking clean your champagne bottles and fill them with your price. Make sure you close the bottles carefully or otherwise you will get a shower from the exploding corks. I have been there and it is not a nice way to wake up. Ha ha.
Store the bottles somewhere noone can find them for a few months and enjoy the results.
Beginning and end.
Just after starting fermentation. Better than a lava lamp. Even better than most TV.
Fermenting in the ugly stage.
Bubbles in the glass.