Man, I use to just drink 1-2 gallons of milk almost daily! Thats no BS, on my life! and I attributed much of my growth in size and strength to drinking a shit ton of milk, whole milk too!
The lady at Wawa finally asked me one day about it, and when I told her, she laughed as if I was joking.
The only time I can drink a shit load of protein is when it comes premade, so in my 20’s I drank mostly the cardboard type container Myoplex, and it seems a lot of manufactures dont make or push the high protein drinks anymore, as I think mine were like 42grams , now days its all bullshit, so much so that I think they are all full of shit, so I just go to BJ’s and Buy 2 or 3 cases of Premier Protein premade shakes, and they 32grams
Mixing powder drinks yourself sucks ass!
edit: As to drinking that much milk, its only recommended if your juicing lol,