Purity: Wudu from a Usurped Utensil
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 272:
If a person owns the wuḍūʾ water but the water is in a usurped utensil and no other water is available, then in case he can empty the water in a lawful manner into another utensil, it is necessary for him to do so and then perform wuḍūʾ; and in the event that this is not possible, he must perform tayammum. If he has some other water, it is necessary for him to perform wuḍūʾ with that other water. In both cases, if he acts contrary to the above and performs wuḍūʾ with water from a usurped utensil, his wuḍūʾ is valid.
-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)