... has several sorts of perfume,which cater to your need.such as lemon,mint,lavender,charcoal,non-perfumed etc ... ,after modern high technology manufacture,is a kind of enviroment production fragrant dew.4.PP lid,PP ... .6.the span life is aboue 45-60days,of course it depends on different enviroment.7.drive ... the smelling of rooms effectively,and keep the air fresh,long ...