This looks like a fun little project that I think people here would enjoy! I have a little stack of tin foil takeaway boxes that I could use for this. Just need to get hold of the plexiglass (or the oven bag they suggest, but I’d like to do it entirely with reusables if possible).
EDIT: Grammar.
I’ve done this and it definitely works, but it’s also finicky for sure. What I’d really like to know is how to build a DIY evacuated tube. AFAIK, the current very best designs for a solar oven use one, and almost nobody seems to manufacture the things.
Like this kind of thing?
https://en.wikipedia.org/wiki/Solar_cooker#Vacuum_tube_technology
Yeah exactly! I’m not sure how they’re made… Maybe like a vacuum chamber that is also a glovebox? So you could put the tube+lid in the chamber, evacuate the atmosphere, use the gloves to apply the lid, then release the vacuum? Do gloveboxes work under vacuum?