We say that one thing is de mirame y no me toques when is very fragile and is about to break.
Also, in South America is used with people, when the person is ease to be upset or angry.
Synonyms of mírame y no me toques are frágil deteriorado flojo estropeado delicado para personas susceptible especial irritable malhumorado
Used in US as well
"Lleva cuidado con ese jarrón que es de mírame y no me toques. No le digas nada a Juan que es de mírame y no me toques."