They are beautiful! Do they have names? I'm sure they will appreciate 10 gallon tanks more than that little bowl. My bettas are in 5.5 gallon tanks. I did try a 10 gallon -- it wouldn't fit where I wanted to put it!
Be careful of plastic plants. They may tear a betta's delicate fins. That happened to me once.
Silk plants are cheap too, like the plastic ones.
I never had a female betta, and never tried to breed them. I've read that the male and female shouldn't be together except briefly, to breed. Otherwise, they may fight. But I don't have any firsthand experience with that.