Further clarification regarding the Prophet’s (peace and blessings be upon him) prohibition of drinking from the mouth of a water skin

The questioner : Our brother Abu Mahmud brought us our shaykh’s cups, and they have a chip in them. The Prophet (peace and blessings be upon him) forbade drinking from a chipped cup. Does the prohibition apply to drinking from the chip itself, or from the cup that has the chip?

The Shaykh : There is a difference. For example, if the cup has a chip running from the top to the bottom, it is not permissible to drink from that cup at all. But if the chip is in the rim of the cup and the water or drink does not reach the chip, and he drinks from the other side where there is no chip, then it is permissible. Is that clear?

The questioner : Yes, it is clear...