عن أبى سعيد الخدرى رضى الله عنه قال ‏:‏ نهى رسول الله عن اختناث الأسقية ‏:‏ يعنى‏:‏ أن تكسر أفواهها، ويشرب منها‏.‏((متفق عليه))

Umm Thabit Kabshah (May Allah be pleased with her), daughter of Thabit (May Allah be pleased with him) and the sister of Hassan bin Thabit, the Prophet's poet) reported

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 (ﷺ) 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.