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If you’d like to take a crack at anodizing your titanium camping gear, try submerging it in Coca-Cola and running 20v-100v through across it. This can be achieved using 9v batteries and a little patience. Depending on the voltage applied, you can transition between Bronze, Blue, Light blue, Yellowish, Purple, Cyan, and Green. [via hackaday]

Adam Flaherty

I make cool stuff and write about other people making cool stuff on If you have something you think I should see, send me a tip.



  1. Interesting technique, but I must correct an error. One does not “run” voltage “through” anything. Voltage – across, current – through.

    1. Adam Flaherty says:

      Thanks for pointing that out, David!

  2. I recognize that titanium spork! :)

    1. muttnik says:

      Yes, that spork does look familiar! And it’s a thing of beauty, isn’t it.

  3. Shotgunner says:

    ummm… plain ole salt water works. You just need ions to make the water conductive.

    The concept of daisy chained 9 volt batteries is clever and doable by everyone.

  4. watermark says:

    Can this be done with other metals, like Aluminum?

  5. Quora says:

    Why do lots of bubbles appear when I pour coca-cola into a Titanium cup?…

    Coca cola foams more when it touches materials which are: 1. Surfactants, decreasing the surface tension of the bubbles (that’s what happens with Mentos). 2. Rough or porous, because of the high specific surface (that’s why ice cubes make coke foam)….