“The Messenger of Allah ﷺ forbade drinking (directly) from the mouth of a water skin.” (Using translation from Ibn Mājah 3421)

أَنَّ رَسُولَ اللَّهِ ﷺ «نَهَى أَنْ يُشْرَبَ مِنْ فِي السِّقَاءِ»