In this section is an explanation of what the Capsule Corporation really is, and what they achieved in the Dragonball/Z/GT World.
The Capsule Corporation
In the Dragonball/Z/GT World, the Capsule Corporation makes many, many devices, from vehicles to personal electronics and robots. From his mansion headquarters in the Western City, Dr. Briefs controls this vast worldwide manufacturing empire that has managed to stamp its ubiquitous C-in-C logo on almost every technological device in the Dragonball/Z/GT World. He passed away in Dragonball GT leaving the company to Bulma and Trunks to run for the remainder of the series.
What are Capsules?
Capsules are small, about 3 inch long, cylinders with push-plungers on one end. Depress the plunger and in moments, whatever is in the capsule expands to its original mass and dimensions (its generally considered a smart move to throw the capsule away from yourself immediately after pushing the plunger). Push a button on the side of the expanded object and it becomes a capsule again. While in capsule form, an object has virtually no weight, and takes up only the space of the capsule. Capsules are always numbered so that their owners can tell what they're pulling out of their pockets (it's bad form to expand a house in a crowded space). However, capsulization is an expensive process, and very few people can afford more than a couple of capsules of their own. Luckily Bulma, whose father, Dr. Briefs owns the Capsule Corporation, actually carries a pocketbook full of capsules!
What comes in Capsules?
Everything! Besides its own vast array of products, the Capsule Corporation also encapsulates other companies' goods; food, clothes, vehicles, houses, weapons, tools, personal electronics, and even, much to the delight of Master Roshi, adult magazines. Those with enough money can even have special items encapsulated.