Hi, Vince! Thanks for visiting the Disney Parks Moms Panel and asking your question!
I have a small collection of souvenir cups and mugs from my past Disneyland Resort visits. Some of my favorites are the glasses from Trader Sam's Enchanted Tiki Bar and the Dinoco oil can cups from Cars Land. Unfortunately, any previously purchased cups and those you buy new at the parks are not refillable. You can, however, purchase a beverage in a regular paper cup and pour it into your own cup that you brought along if you would like. Might be a bit of an extra hassle though.
If you'll be visiting soon, make sure to check out all the amazing food and drinks offered as part of the
Disney California Adventure Food & Wine Festival. There are tons of festival marketplaces in Disney California Adventure Park where you can sample a wide variety of Californian cuisines and libations. If you happen to be an Annual Passport holder, you can purchase the
Sip and Savor Pass to receive exclusive savings on festival offerings.
I hope your visit to the Disneyland Resort is full of food, refreshment, and fun!
-Linda