One of my friends and I have developed a habit of drinking water from only copper vessels as I have read several benefits of drinking from that. But I observed one strange phenomenon during past few months. Even if both of us wash our vessels on the same day still my vessel gets darker and more stained than his, almost always within a day or two. On the other hand, his vessel keeps looking shining and less stained. I know these stains are results of oxidation, but still why do they react differently being with different people ?

[ PS : We had bought our vessels on same date from the same shop, both of us stay in the same dorm room, eat the same food, and have very similar living habits ]

  • This seems to be a question for Chemistry, but I doubt it is answerable over there: too many variables. They still may come from two production batches. Your skins will differ. Are they stored the same?
    – user22865
    Feb 8 '16 at 8:33
  • Welcome to Skeptics! According to the FAQ, Skeptics.SE is for researching the evidence behind the claims you hear or read. This question doesn't appear to have any doubtful claims to investigate. Please edit it to reference a notable claim and flag for moderator attention to re-open (or get 5 re-open votes).
    – Oddthinking
    Feb 8 '16 at 8:52
  • To @Oddthinking: Sorry if I have posted in incorrect place, could you please tell me where would this question be suitable? Feb 8 '16 at 9:09
  • The comments are not an invitation to speculate about answers. Please stick to issues of how we can fix the question, or take it to chat.
    – Oddthinking
    Feb 9 '16 at 10:09
  • @PointNetworks: You added a link to a page with many [spurious!] claims. If you want us to address one (not all) of those, it would be on topic. The issue of whether your washing up regime is the same as your friends is off-topic though.
    – Oddthinking
    Feb 9 '16 at 10:10