Abu Sa'id (Khudri) reported that Messenger of Allah ﷺ forbade from turning the waterskins upside down and drinking from its mouth. (Using translation from Muslim 2023a)

أَنَّ النَّبِيَّ ﷺ «نَهَى عَنْ اخْتِنَاثِ الْأَسْقِيَةِ»