Just got back from CSR last night. We got the mugs last year at POR and used them all the time, so figured we'd get the mugs right away. We got the mugs the 1st day we were there - BIG MISTAKE!!! You could only get pop, coffee or tea with them, NO juice or hot chocolate (which just amazed me - if you don't drink coffee or tea, what are you supposed to drink for breakfast???

). We were also so far away from the food court area that we only used our mugs a few times. My advice would be to check and make sure you're going to be able to use the mug for what you want and enough times to make it worthwhile BEFORE you buy it!
We went to look at other resorts and they all had the generic mugs, but we only had the old mugs - nice to keep, I agree, but it would have been nice to have had the same mug as the other resorts.