"What do the men drink?"
Translation:O que os homens bebem?
Why can you not use 'Qual'? According to the tips for this section: 'Que' asks for definitions and explanations. It's used when you want to understand what something is, more than simply knowing. Qual - as a pronoun: This one is used to ask things that you do understand, but you don't know what/which they are. Sometimes it's "what", sometimes it's "which".
I understand the concept of men drinking something, but I want to know which is their drink of choice. As far as I can see, from the tips, that should mean that 'Qual' is ok! I'm confused!