We were on the Wish 7/22-7/25, and my husband brought his old token to try to use it for the mug. We were told that they would not accept the old token and he needed to buy the new Wish mug, which is shorter, wider, and I believe thicker than the older ones. We didn't measure it, but we thought it was actually aslightly bigger volume than the old one. Maybe someone has measured it already.... He was able to trade it in for a new token that would be good on the Wish AND the other ships. However, we came home with the mug not the token since it's a nice souvenir and he has the old token which should/may work on the other ships when we sail again. Also, the bars on the pool deck were using the blue plastic mugs, the new token worked just fine.
Just our experience and things may have changed in the past month.