Looking up MCR now, a GBG-based container company recommended by Mathias Gullbrandson. They are building him a custom 20’ container now to be used as his tiny summer house.
They are active all over Sweden and seem to be more experienced with custom containers than Containertjänst judging from their website. They explicitly work with event containers and have plenty of interesting examples on their site (professional kitchen containers etc.), including an ice cream container seen below:
I will contact them and see if they would be interested in working with us (without compromising the Containertjänst deal of course).