I liked the original design by @Kuba, but I needed it for two laptops, so I added a second one. It supports laptops up to 2cm thick. I also added some fabric to prevent scratching my laptop.
I used eSun PLA Matte in White with 15% infill. I would recommend at least 15% infill; otherwise, the middle part might be too weak and may not support the weight of a laptop leaning on it.
This was my first experience with designing, so if you have any suggestions for improvement, please let me know.
The author remixed this model.
I added a second slot for another Laptop.