So.. wait. Would this work for an "on the spot" incubator? I'd never considered incubating in something like that.Sounds like you need;
A foam egg carton with lid removed
Insert into a plastic type shoebox with holes punched in it.
A small container of water in plastic shoebox.
A thermometer in the plastic shoebox
Set Under a lamp you are going to leave on for 21 or more days depending on the eggs type. Happy hatching!