First of all, aluminum is a very active metal, so the surface layer of aluminum products we use is not aluminum, but a thick layer of alumina, which is very stable under neutral and weak acidic (weak alkaline) conditions. For example, the main component of ruby and sapphire is alumina, and alumina also accounts for most of the soil components. The tap water we usually drink is neutral and acidic, and will not release aluminum ions in alumina.
Secondly, we know that aluminum ion is a kind of easily hydrolyzed metal ion. Heating and dissolving carbon dioxide in water can make aluminum ions produce aluminum hydroxide precipitation, so even if aluminum ions exist, it is difficult to exist in water in large quantities.
Thirdly, aluminum is one of the elements with the highest content in the earth's crust. There are a lot of aluminum in nature, so it goes without saying that aluminum is discolored. As long as aluminum products are used normally, it is safe not to hold acidic or strongly alkaline liquids for a long time, and the trace aluminum ions emitted by them will not cause harm to human body.