Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 3 years ago
Drinking in copper vessels is allowed as far as the vessel does not have any rust on it and is not gold plated or silver plated.
It seems from some references that it is like a medication, so it should not be repeated more than what is required. There is a narration in Mawsoo'at Al-Hadeeth Al-Tibbiyyah موسوعة الأحاديث الطبية ( Ecylooedia if medical narrations) discouraging drinking water in copper vessels as a habit because it can cause some harm.
Wassalam.