12:10 - 2017/12/10
There is no objection to drinking served water and tea by a non Muslim If you are not confident that he had touched them with his body.
Question: One of our workmates is not Muslim and he serves us water and tea. Are we allowed to drink what he serves?
Answer: If you are not confident that he had touched them with his body along with transmitting moisture, there is no objection to drink them.[1]
1. Ayatollah Seyyed Ali Khamenei, Newly Asked Questions, A Non-Muslim, Drinking Something Served by a Non-Muslim.