Of any of my trips to Disney World, the best souvenirs I've ever gotten are a set of 6 glass mugs (root beer style mugs) from the LTT restaurant and a cake stand.
The LTT mugs are the same ones they use in the restaurant and they're available for purchase at only $5.00 each. Depicted on one side is the Liberty Tree and the Disney Characters marching in Colonial attire are depicted on the other side. I had them shipped home and now we use them regularly for drinking glasses.
The cake plate I had made at the glass blowers shop in the MK in 2011. When I went in, I didn't see anything I particularly liked, and I was in need of a cake plate stand. I asked the guy working if they could make one, and although he said he'd never done one before he made it for me. It took two guys to put together and blow because the base had to be made at the same time as the actual plate to keep it from drooping. I took pictures while they were making it which makes it a really good souvenir. The glass shop shipped it to me so it came shortly after I returned home from my visit. It sits on my counter. The plate is made of clear glass and the pedestal base is colored red. It's got the little bubbles that handblow glass gets, and everyone that sees it likes it. For me, it's a constant reminder of disney world. It was a bit pricey at $200.00 but it's the most functional and nicest souvenir I've ever purchased. (It was a birthday present to myself).