So, I wanted to get a picture of Barney in the carrier (or as I like to call it his house) and he wasn't in it, so I told him to go in his house - and he did. He got out after the pictures, and wouldn't do it again. It had to be coincidence but it was still cool. Anyway, here he is in the carrier, and then I did a top shot so you can see the shape - it is like a rounded rectangle.
ETA - I decided to add a side angle - the open part goes most of the way around then the front is how you see it. The sides unzip from the top and bottom and it all goes together and the top and bottom zip together with the middle inside.