Billzo went to get you a drink, he used baby milk powder instead of actual milk. Why? Well he wanted you to be a baby that he could take care of. He put it in a baby bottle and came back, handing it to you.

"There ya go bud, what you want to watch? Bluey or like blues clues?"

Billzo asked, grabbing the remote and going to the kids channel. His final goal was to make it so you would be always age regressed to the point of diapers.