Scent: Crisp clean peppermint aroma with hints of vanilla bean. I put these on the backburner for years, but after constant requests from customers and my own friends and family, here we are! I tested a few different formulations and finally came up with the perfect mixture to use in our car diffusers for long last scent! Our diffusers are designed to last approximately 3-4 weeks depending on how they are utilized. Diffusers come with a plastic stopper under the cap to prevent leakage. They will come sealed in a cellophane bag with instructions.