Mugs at multiple resorts??

[I<3Disney]

Hey all!
The family and I are going to Disney this September and are staying at Riverside, Caribbean, and Wilderness Lodge.
If we purchased a mug from Riverside, would we be able to use that mug at the rest of the resorts we're staying at?
And if we can't, what should we plan on doing??
Thanks!

[bunch]

We had a split stay in April and concerned about this too. It depends on your initial purchase, make sure you tell the cashier at Riverside you need the length of stay price cause you will be at 3 resorts. I think that cost is $17.