Here's what I'm imagining instead. A 1/2 sheet sized box (think 8.5 x 5.5 x 1.5 box with a sealable lid. Interior volume is divided into two compartments (2/3 and 1/3). I think I'd like the material to be the same as the tiffin lunch kit (thin walled ceramic) but I'm open to other suggestions as well.
Couple of questions.
1. ANy suggestions on which tool works better for creating objects like lunch boxes?
2. What material do you think would work well - I would need it to be microwaveable?
I suggest that with two materials, you order the ceramic first, and then take measurements from that to make the lid.
(ceramic print measurements can vary, but the plastic is accurate to under 1mm)
The slight flexibility in the plastic will help it fit snugly.
You could also use the plastic to make custom inserts for a store-bought box.