The Book of Drinks (Kitab Al-Ashriba)
Muslim :: Book 23 : Hadith 4949
Jabir b. 'Abdullah reported that Allah's Messenger (may peace be upon him) forbade (the preparation) of Nabidh in green pitcher, in varnished jar, in hollow stump, and when Allah's Messenger (may peace be upon him) did not find anything to prepare Nabidh in that (i. e. waterskin), it was prepared for him in a big bowl made of stone.