~ Kupu by Harri Koskinen

Every designer has come across the inevitable services that yes are life saving, but are also visually unattractive. Called 'Kupu', these fabric covered smoke alarms come in a range of colours, including a chome plated version. The whole surface of the smoke alarm acts as a test button, so nothing else is seen - very simple & one of those times when I think why didn't someone think of this earlier.
There is also a more playful version designed by Paola Suhonen in the shape of a moth.

Kupu smoke alarm

Lento smoke alarm by Paola Suhonen