Our products mainly designed for promotional use and they will last 1 week or more depending external factors and fragrance you choose. Some perfumes will perform weak/light, some strong, some will last longer than others. If you remove packaging gradually you could get up to 2 weeks life or more from 3 ml perfume on each fresheners we will apply individually. These are promotional use products and this is longest life for promotional use fresheners. We will apply 3 ml perfume to each freshener, compare this to our competitors most apply only 1 ml.