Edit: They did change the image. In the last image, they showed a metal surface which wrapped two times and had not the properties of a mobius strip.
Edit 2: found it, the old image was this stock image: https://www.istockphoto.com/de/foto/moebius-streifen-in-meta...
This is still a single-sided surface though (with the 2 twists).
Wikipedia: "the Möbius strip can also be formed by twisting the strip an odd number of times greater than one"
Not sure about needing to be "odd", I think 2 qualifies as well, so perhaps odd or even AND prime does it...
(I'm talking about this image, from the second edit: https://www.istockphoto.com/de/foto/moebius-streifen-in-meta... )