You can either keep it or give it to the quest-giver. (Cant remember the location) This brewing machine is literally a modified protectron that acts as a fridge and a beer brewer. In goodneighbour theres a quest to find a new brewing machine.
If youre looking for something to spruce up your nuka colas ingame MINOR SPOILER BELOW There was so many made pre-war you can still find them 200 years later. Plus the company behind nuka cola is dead. Baring in mind it was a group of raiders in DC who found it.
