Which helps us identify this next piece of KirbyTech, the Tesseract Box. Since tesseract means cube and box means cube, what you have here is a cube cube.
Panels from Fantastic Four/Fantastic 4 [Annual] '98 (December 1998), script by Karl Kesel, pencils by Stuart Immonen, inks by Cam Smith, colors by Gloria Vasquez, letters by Jon Babcock
Not certain if Reed Richards created and built this (so he doesn't get credit for it in the post title!), but what it appears to do is keep food fresh, which means maybe Sue bought it at one of Janet van Dyne's frequent Tupperware™ parties. Actually, from the context it appears to not only keep the delicious, pungent scent of stinky cheese out of the kitchen, it may also be bigger on the inside and hold it within a time-space lock to keep it from aging.
So i'm guessing the tesseract box is a cross between...quite possibly the intelligent offspring of...the TARDIS...
...and a Thrint/Slaver Stasis Box.
And you can keep cheese in it. Now I know what I'm getting my pal John for his birthday!