In this case, it is most likely maltodextrin made from tapioca. There are recipes out there, and it costs about $10.00 a pound or so.
The recipe I saw had 100 grams of powder to 30 grams of high proof alcohol.
I don’t drink much, and can’t see the point of it for the purpose of getting drunk. The thing I envision it being good for is cooking or setting alight - it is highly flammable.