We're glad to hear that you're breathing happy with Febreze, Santi. We can assure you that our products go through many quality checks to ensure that the weight listed reflects the fill level of the liquid. It may be helpful to know that the space above the liquid is occupied by nitrogen, the propellant we use so that you're able to spray the product out of the can. We'd be happy to answer any questions you may have, so please know that you're always welcome to give us a call at (800) 308-3279.