I was asked to make this table (4th pic) except with a wood base and smaller top. It, as you can imagine, had a lot of challenges with all the different angles. I accept the challenge... Keeping the top and bottom flat and level in relation to the angled sides was quite the fun. Every piece was different. I used birch ply material and veneered the ends that showed the plywood edges. It's stained black with a precat lacquer finish. The top was finished with conversion varnish.
The top is approx. 1 1/2" Thick.
Figuring out how to do something you have never done is what makes a good challenge.