There is a new Seven Dwarfs Mine Train popcorn bucket available at Walt Disney World (and maybe Disneyland too? Usually they go to both parks). This bucket opens up like a treasure chest and if you purchase multiples, they can be linked together.
These popcorn buckets can be found in the Magic Kingdom. I am not sure on price, but I am guessing it is around $12.95 – $14.95. If anyone finds one, be sure to let us know!
(Thanks Chip and Co!)