This is my favorite cigarette case design. 10 cigarettes is perfect for me personally and it takes up less room in my pocket. I've been using this design for over two years now and have never managed to break it. People really like it and I've sold quite a few.
The lid is a little tight at first but as it breaks in it is perfect. If I didn't make it this way I found that the lid would eventually get too loose.
I like to use transparent PETG for this but it works equally well with ABS or PLA. No supports are necessary.