For someone that has not been turning long, you have done an excellent job on the cup. The form and finish are perfect! That project has a lot of class.
Nice job! I like the shape, I may have to borrow that.
In the future you might want to try a forstner bit instead. I use them on all my vases and pen/pencil holders. I've tried spade bits before, and the cut is cleaner and easier with a forstner. You just have to back out and clear the waste often to keep the bit from getting so hot that it goes dull on you. I like to use a bit of WD 40 as a lubricant. Spray it on every time you pull the bit out to clear the waste.
You may want to check out some of the videos on boxes. Richard Raffan does one that's on netflix, that's pretty good. He's really fast, but he shows how to do it with turning tools and a smaller drill. It takes him about 10 seconds to scoop it out. It would probably take me about 20 minutes.
Anyway, that's a nice job and the colors are fantastic.
Rob