Questions & Answers about Bebo leche en un vaso grande.
Why do we use en here? In English, I might say I drink "out of" a glass.
Where is the word for "I" in this sentence?
Why is there no la before leche?
Just like in English, when you talk about an uncountable noun in general (some milk, rather than the specific milk on the table), you do not need the article. You can just say bebo leche (I drink milk).