Translation:I want juice.
That depends. "Juice" and "water" are uncountable nouns, but what if we're talking about bottles of drink? A "bottle" is a discrete and countable unit, so in that case you might say, "I'd like a juice/water, please." We might not say "bottle", but it might be obvious from context.
Yeah, people speak that way, but it's for brevity and is not really correct, spread by commercialism (ordering fast-food and at convenience stores) and so only applicable to certain products. Try some other substances without defined shapes. Give me a sand and a slime, a syrup and a salt, a gas and a solution. Well, you never know where the future may lead . . .