وعن أم ثابت كبشة بنت ثابت أخت حسان بن ثابت رضى الله عنه وعنها
قالت: دخل عليَّ رسول الله صلى الله عليه وسلم، فشرب من فيّ قربة معلقة قائماً، فقمت إلى فيها فقطعته
The Messenger of Allah (sallallahu alayhi wa sallam) visited me and drank some water from a hanging water-skin while he was in a standing posture. So, I stood up and cut off the mouth (of that water-skin). An-Nawawi said that the reason why she did this was to preserve the part of the water-skin which the lips of Messenger of Allah (sallallahu alayhi wa sallam) touched, gain blessings from it, and preserve it from dishonor.
This narration is understood to show permissibility whereas the previous two narrations are to show what is better and closer to perfection. Allah knows best.
Riyad as-Salihin 763, Book 3, The Book About the Etiquette of Eating, Hadith 37. 1 min read