The Messenger of Allah ﷺ forbade the use of gourds, green earthenware jars, vessels coated with pitch, and hollowed tree trunks as containers, and he forbade mixing unripe dates with ripening dates.
أخبرنا واصل بن عبد الأعلى قال حدثنا ابن فضيل عن حبيب بن أبي عمرة عن سعيد بن جبير
نهى رسول الله ﷺ عن الدباء والحنتم والمزفت والنقير وأن يخلط البلح والزهو
Reported by Muslim, Ashribah, chapter on the prohibition of steeping nabidh in tar-coated vessels and gourds... etc., no. 41/1995, from the hadith of Muhammad bin Fudayl bin Ghazwan through this route, and it is found in Kubra, no. 5057.