This has been planned for some time and is a custom design so its frame will fit her frame. Custom paint and everything is recyclable, although hopefully that won't happen for many decades. This is a work of art. Go to her blog and look at the closeups!
Trek is very committed to supporting her and her program to convince kids and their adults that biking is a good form of basic transportation.
If you are looking for a new bike, Trek is a brand to consider.