A friend of mine is a mathematics professor at a university... He recently started a channel on YouTube.
"So what?" I hear you cry...
I thought some might be interested in his video on...
How to put a Rubik's cube in a bottle !
Now, there could be a business angle here... A Rubik's cube in a bottle could make great novelty gifts to sell! However, you'd have to get your process of creating them to be as efficient as possible (which may not be easy)...
Meanwhile, if you're feeling up to a challenge, check out his video on
Klein bottles and Rubik's cubes...
Something a little different...
Let me know what you think...
Best wishes!
Dien