From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
The concept of the Capsule House is first introduced in The Adventure of Tongpoo.
Notable Capsule Houses
Bulma's first Capsule House
Bulma Brief used a Capsule House that she owned when going on her trip to find the Dragon Balls. She camped with Son Goku near Ryugadani with this house. She lost this house when she lost her case of Capsules in a lake just before arriving near the Diablo Desert.
Main article: Mobile Home
Main article: Kame House
Bulma's second Capsule House
The Capsule House appeared in the live action South Korean film. The design was entirely different from any shown in the manga or anime.