Bestseller alert 🚨 These are a customer favorite + LAST SO LONG, keeping your vehicle smelling fresh. Each bottle holds 8ml of fragrance oil • Long Lasting fragrance ***Please take into account that these are OILS!! In your car they will heat up, DO NOT let oils drip/leak inside of your vehicle as hot oils = melting hazard for any type of plastics!! If diffusers get to hot please remove them from your vehicle! Steps: 1.) Remove wooden cap 2.) Take plastic stopper out 3.) Put the wooden cap back on, hang upside down for 2-4 seconds or until lid is saturated 4.) Replace plastic stopper (to prevent leaking if it accidentally gets tipped over) 5.) Hang in the desired area… and enjoy:)