Talmud (Rodkinson Edition) — Book 1…
“ The sages, however, prohibit the use of the juice under any circumstances."Said R. Jehudah in the name of Samuel: "A man may squeeze out a bunch of grapes directly into a pot, but not into a bowl. (Why not? Because if he squeezed it into the pot it is proof positive that it will be used for food, but if squeezed into the bowl it might be used as a beverage.) Said R. Hisda: "From the decree of our master we can learn, that a man may milk a goat right into the pot, but not into a bowl." Thus we see that Samuel holds, that beverages when mixed with eatables are also regarded as eatables. ”
