Let's find out how they put 3D images into glass objects. Known as a 'Bubblegram', vitrography or sub-surface laser engraving, this technology has been around for a very long time but remains quite niche in its applications.

Resources I used in research this video:
https://en.wikipedia.org/wiki/Bubblegram
https://en.wikipedia.org/wiki/Laser_e...
https://www.google.com.na/patents/US6...

DISCLAIMER: Maker's Muse aims to provide educational content through YouTube videos and endeavors to provide accurate information, however it cannot be guaranteed. Always seek out alternate resources when conducting research.

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