Glass Jug inside of a Jug

That is extremely interesting! I wonder where the little puffs of flame that you see when the jacks (?) are being used on the glass come from.

Glassblowers use wax to lubricate the jacks so they glide smoothly over the surface and don't scratch it, they also tend to make an irritating screeching noise not unlike nails on a chalkboard without it. If there's an excess amount of wax or the glass is really hot the wax will flare up like you see in the video.

Oh thanks for that! I appreciate the answer. Glassblowing is so interesting to watch, I would love to try it sometime.

I highly recommend it!

i think alot of people could have guessed how the romans did that but most people are STILL trying to get figure out how they get that ship in that bottle its collapsible and then pulled backed into shape once in the bottle!

nice bill