Here are a few possibilities (depending on situation):
Veux-tu du thé ou du café?
Est-ce q'on préfère le thé ou le café?
Voulez-vous du thé ou du café?
My French is rather rusty and tends to be Cajun-ish, but all of these sentences "feel right", anyway. With these three sentences, I am demonstrating three different formality levels, as well some subtle distinctions in what exactly is being asked (do you want...? would you like...? which of the two do you prefer?).