yeas, there are several makes that use that shape. Someone once told me that the original form for moulding it was designed for a sewage catchment basin.
The one I see most often is the Trillium. In fact, there was even one at the Toronto RV Show a few years back, IIRC.
As I have mentioned before, I am 5' 17" in height, so it never even crossed my mind to get one of those trailers, despite the cuteness and possibility of towing it with many, many smaller vehicles.
It's so small, I would have to go outside to change my mind.
If it's to be, it's up to me.