Al-Mukhtār ibn Fulful reported: “I asked Anas ibn Mālik (may Allah be pleased with him) about drinking from vessels. He said: ‘The Messenger of Allah (ﷺ) ﷺ prohibited pitch-coated vessels, and said: Every intoxicant is forbidden.’ I asked: ‘What is a muzaffata?’ He said: ‘It is a tar-sealed vessel.’” Reference: Musnad Aḥmad 173