The idea to create a candleholder made of borosilicate came whilst watching the movie 'The Favourite' at the cinema, because there was so much candle lighting in the film. After a few months of sketching different shapes it became clear that a shape would work as a timepiece. By adjusting the amount of water contained one changes the amount of time that the candle will burn for before it capsizes and self-extinguishes. This burn time may be discovered by referring to a graph which gives time verses water quantity (measured in millilitres).

The object is named after the candle's maximum approximate burn time of 231 minutes (three hours and fifty one minutes). It is individually mouth-blown and formed by hand on a lathe by a highly skilled craftsman using the same processes that create chemistry apparatus.

There is a reduced fire risk as a result of the self-extinguishing feature of the invention.

'An impressively simple, physical principle translated into a beautiful, decorative object.'
Jury statement - German Design Award 2021

GTIN: 5070000708454