Sayyiduna Ibn Umar (may Allah be pleased with them both) narrates that during the blessed time of the Messenger of Allah (peace be upon him), we men and women used to perform ablution together and would wash our hands from the same vessel.
Hadith Referenceصحيح ابن خزيمه / جماع أبواب ذكر الماء الذي لا ينجس، والذي ينجس إذا خالطته نجاسة / 120