aruat (Thai: จรวด) is the proper term for rockets used as missiles or weapons, but Bang Fai (Thai: บั้งไฟ) skyrockets are gigantic black-powder bottle rockets. Tiny bottle rockets are so-called because they may be launched from a bottle. In the case of the similar appearing Bang Fai, also spelled 'Bong Fai' (Thai: บ้องไฟ), the 'bottle' is a bong (Thai: บ้อง), a section of bamboo Culm used as a container or pipe (and only colloquially as a pipe for smoking marijuana.)[5]