Is praying upon the Prophet (peace be upon him) better than remembering Allah Almighty, and is it considered a form of remembering Allah Almighty, and is there a specific remembrance after drinking water?

Praying upon the Prophet (peace be upon him) is not the best form of remembrance (dhikr) in an absolute sense. The best form of remembrance is reciting the Holy Quran, unless there is a specific remembrance tied to a particular time. In that case, it is superior at its designated time. Examples of this include praying upon the Prophet (peace be upon him) on Friday and its eve, responding to the call of the muezzin, and the prescribed remembrances after the obligatory prayers. As for drinking water, it is legislated to praise Allah Almighty after it, based on the Prophet's (peace be upon him) saying: "Indeed, Allah is pleased with a servant who eats a meal and praises Him for it, or drinks a drink and praises Him for it."