It is no secret that you can get elemental gas tubes glowing around a tesla coil. This Handmade Neon Plasma Cup is made based on the same approach. It is filled with neon gas to create trippy patterns on an electronic coaster or near a mini tesla coil.
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Handmade Neon Plasma Cup for Tesla Coil ⚡ Gadgetify
These types of plasma glass can be made in all kinds of shapes and with other gases.
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