rice cooker
n.— «In the vernacular, Vietnamese frequently refer to helmets as “noi com dien” or “rice cooker” because they are hot and uncomfortable.» —“High road toll pushes Vietnam towards helmet use” by Grant McCool in Hanoi, Vietnam Reuters Apr. 12, 2005. (source: Double-Tongued Dictionary)
Further reading
How and why do words from one language find their way into another? Vietnamese, for instance, includes lots of words borrowed or adapted from French. Such linguistic mixing often happens when languages brush up against each other and speakers reach...
How and why do words from one language find their way into another? Vietnamese, for instance, includes many words borrowed or adapted from French, a vestige of colonialism. For example, the Vietnamese word for “train station,” ga, comes...