I adapted the great parametric rugged box model to fit the tiny Miniware MHP30 hot plate because I was worried about its thin struts getting bent. This is small enough to throw into a little soldering kit. The parametric .f3d model is included, so you can make changes easily in Fusion360 by clicking Modify > Change Parameters in the top ribbon.
You will need 3x M3x20mm socket head screws for the hinge and latch by default, but again that can be adjusted with the parametric model to a different size.
I also put 3mm foam in the base and lid of mine for what is probably an unhelpful amount of padding, but have included a version that's 6mm shorter to fit the same without foam. I didn't have TPU to make the gasket, but the lid feels snug enough without it.
The author remixed this model.
Resized to fit a tiny hotplate, added a little geometry to hold it snugly.