The cost of the bucket is $15 and it can be purchased now through June 25th or while supplies last at participating popcorn carts in Disneyland Park. Refills are available for $1 at popcorn carts in either park through July 30th. Specialty popcorns are not included and your Annual Pass must be valid for admission that day to redeem the offer.
A similar Annual Passholder popcorn bucket was released earlier in the year, but $1 refills only apply to the new bucket. A refillable bucket will be available for purchase at Disney California Adventure soon.