What insulation you should choose depends on climate, location, application and national building codes.
Our units are insulated with PU and/or glass wool sandwich panels. EPS is also available if you prefer a cheaper option.
You can choose between thickness 50mm, 75mm and 100mm. The thicker the better but there's also a price difference and you might not need more than basic, lower cost thickness. It all comes down to climate and what you will use your container house for.
Some links with more information: