Just as we have litres, gallons and other containers to measure volume, the mudd and sa' were common units of measure used in the era of the Messenger of Allah ﷺ.
In modern day measurements, one mudd equates to approximately 775ml. As can be seen from the hadith above, as well as numerous very similar narrations, the Messenger of Allah ﷺ used to perform ablution with a mudd full of water.
Al-Mudd al-Nabawiyya allows us to see exactly how much water the Prophet ﷺ used for his wudu. We may make a habit of using this vessel of water for performing wudu ourselves, which may become a source of reward for reviving the practice of this Sunnah. The use of this vessel also helps us to not waste water, which may be an additional sources of reward.
As the mudd is a unit of measure, these vessels are not limited to ablution but can also be used for measuring things such as rice or flour. This vessel helps us to better understand the numerous Hadith that mention this measurement:
Narrated Anas bin Malik رضي الله عنه: Allah's Messenger ﷺ said, "O Allah bestow your blessings on their measures, bless their Mudd and Sa." The Prophet ﷺ meant the people of Medina. (Sahih al-Bukhari 2130)
IGI's al-Mudd al-Nabawiyya is handmade in Madinah by artisans from the Ansar al-Madinah, with profits from the sale going to support Al-Munawarah Endowment, which supports the needs of the people of the City of the Messenger ﷺ.