Cache-pot rectangulaire en argile

I'm a bit confused if I should keep it or return it. it's stunning, but it's misshaped. The inside bends in on both sides in different areas. Not Sure if that is intentional or not. I don't see it anywhere in the descriptions that it is suppose to do this. I really think it's pretty, but I don't know if I can use it without the inside being fully open with the inches provided.