Not really. It should be in the accusative case. Nominative case "Ο καφές είναι ζεστός" = The coffee is hot, and accusative case "Πίνουμε (τον) καφέ."= We drink (the) coffee.
So if a word ends with ς in the nominative case, it is dropped in the accusative? Like χυμός vs. χυμό? Thank you.