Ibn 'Abbas reported that Messenger of Allah ﷺ forbade the (preparation of Nabidh) in gourd in pitcher besmeared with pitch, in varnished jar, and in hollow stumps. (Using translation from Muslim 17e)
نَهَى رَسُولُ اللهِ ﷺ عَنِ الدُّبَّاءِ وَالْحَنْتَمِ وَالنَّقِيرِ وَالْمُزَفَّتِ وَأَنْ يُخْلَطَ بَيْنَ الزَّبِيبِ وَالتَّمْرِ وَالْبُسْرِ وَالتَّمْرِ