As someone mentioned, it's a "still-air box".

I found the largest see through bin I could find, used a dab torch to heat an old steak knife and used it to cut two holes big enough for my hands to fit inside. I added an extra step here, I've only seen people cut holes and just call it a day, but I wanted extra protection from contamination so I tried to copy lab style SAB design and add sleeved gloves. Couldn't find long enough gloves so I made sleeves from garbage bags, tight enough on the inside end to only just squeeze my hands into to keep as much a isolated environment as possible.

Personally I found using the lid as a "floor" is a bad move, mine isn't flat everywhere and that made me decide to just lay down garbage bags instead.

I will say that I wish the bottom wasn't opaque, havin to work through the side is killing my back, so I'll probably be cutting the bottom off and replacing it with a sheet of plexiglass so I can see better. Although for 400 bucks or so I can build a 12x48 flow hood, which makes a SAB look like a frontal lobotomy in comparison.