I don't quite agree with Olya. This phrase simply sounds unnatural (выпивать sounds far more naturally here.). And if one of my friends asks me "Хочешь чего-нибудь выпить?" and I answer "Да" (or "Нет", it doesn't matter), it doesn't mean that I'm an alcoholic at all. But the question implies a drink, that contains alcohol. If you want to offer a non-alcoholic drink to someone, you should ask: "Хочешь чего-нибудь попить?" But "Я выпил стакан молока." ("I'v drunk a glass of milk" ) is OK. Funny, isn't it?Originally Posted by Grogs