Time-lapse of forming a double-walled glass vessel - GIF

Time-lapse of forming a double-walled glass vessel.

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Previously:

Glass sheet air float table drop - GIF and video
Glass sheet bending machine - GIF
Glass thread cutting - videos
How glass sheets used to be made - GIF
How to cut a glass tabletop - GIF

I'd like to see how they make evacuated double wall glass containers. Now that's a whole lot more tricky.