How small is too small?

Is it just me or are somethings just made too small, miniaturisation can give you some incredible looking pieces of work. Like this stove.
I have long been a fan of the beverage can stove as it weighs next to nothing and works really well.
This stove is so tiny it can be worn as a necklace, there isn't any detail about how long it will burn for but I don't care. it is worth it even if only for aesthetic valueLink