(Just in case you haven't seen the many, many advertisements backstage...heck, there are even some out here in Florida!)
Walt Disney Parks and Resorts U.S., Inc. and Disneyland Resort recently announced the opening of the Cast Food Connection at the Company D building in Anaheim.
With this new offering, California-Site Cast Members are now able to purchase grocery essentials at deep-discounts over Supermarket prices. It's not meant to be a replacement for a supermarket, but does carry such staples like milk, vegetables, etc.
It's a concept that was ported over from Florida, where it started a few months ago. It's been quite successful here. I save quite a bit by stopping at ours and getting what I can on my Grocery List before heading out to Publix (the Floridian version of VONS) for the rest.