I don't eat in the nsx. But I when I take it to work. I always have coffee w me in my thermos style cup and a bottle of water. I am looking to get a cup holder for the pass side.
I looked into several options for a cupholder and the Dali Racing one works best for me.
I don't eat in my car, but come on people, it's perfectly fine to have a drink. I daily drive my NSX when the weather is nice, and I eat out 3 times per day, so I ALWAYS have a drink in my car. I'm not a child, I don't spill it everywhere.