I have not done but enquired a bit during my research.
There are some who use old shipping containers for the container home building and others use brand new containers in a variety of sizes built for the purpose. With insulation and interiors, container homes do look as good temporary solutions and are often used for construction sites as make shift dwellings. I keep seeing some under the metro work in Hyderabad.
I have had some quotes from a few suppliers a while back and a 20'x10'x8.5' container with roofing, flooring, wall Insulation, inner panelling & provision for Electrical items was in the range of 2.8 - 3.0 lakh Rupees inclusive of taxes. Civil work and transportation was additional.
This does not appear to be cost effective over traditional construction, unless mobility of the structure is of importance.