Reposting from the W&D thread:

So you don't have to squint, they aren't selling refillable cups at the expo. They are *only* available in the post-race/reunion area. And if I'm reading this correctly, they are only
refillable in the post-race/reunion area. No getting a cup after the 5k, and then taking it with you if you make a trip back to the expo for more merch/food/character pics to get refilled there. Interesting move by rD/WWOS. I wonder what the break-even point is for the refillable cups there and people getting multiple drinks vs people only getting 1 drink because it costs the same (no discount) to get a 2nd. Or maybe they felt like people were drinking too much at the expo? Or people were staying longer because they were drinking and it was causing extra congestion? Is this a money thing, or a people-management move?
UPDATE WITH MORE INFO per FB:
"PSA for those that have certain expectations for the expo this weekend.
(Also known as why no beer cups, yo?)
Disney has chosen to outsource their food service for the expo this year. The people who have the contract are part of this [fb] group, and are very motivated to make your food experience this weekend a good one.
In fact they have a post up right now soliciting feedback to fix anything that isn't working.
However, the beer cups that you are used to are a Disney licence, and not part of the contract. It's not the vendor's fault.
Honestly, probably not Disney's fault either, they likely didn't know how popular those cups are.
But regardless of whether or not someone is to blame, the contractual situation is what it is. Hopefully it can be addressed for Marathon Weekend expo.
Please be nice to the new vendor, they are good people, and really do want to make you happy."