personally got it from my friend (the manufacturers of perfumes ) I’m in love with the fragrance giving it because i have one spare.this quantity will last 1-2 years 1.fragrance lasts 24 hours (even if u take bath stays 10 % fragrance) 2. you only need to apply two rolls behind the ears and it will stay 24 hours 3. must have if you need fragrance all day long . 4. 20 % used