Aww! I'm sorry. I originally found it at something generic like discovery.com or something. When I tracked it down on my local provider I found the time difference.

It was a quick clip, they always are with this show. They focused on the mass produced 10 gallons, how they're assembled by hand. The first part of the clip showed how drilled tanks are cut with high pressure water, with a bit of grain of some sort mixed in. That part was pretty cool. I wish they'd gone into more of the big tank stuff, like curved glass.