Best Sellers Bundle: Pack of 10-100 best selling designs. Designs & scents will be selected at random but will all be "best sellers" Each freshie arrives in clear smell proof bag with scent name & string to hang from rear view mirror. How to Use: Hang freshie immediately upon opening package. Do not place freshie on dash. Avoid high temperature. Warning: Keep out of reach of pets and children. Toxic if consumed. These car freshies last anywhere from 4-6 weeks. The fragrance is activated by heat. Therefore, in the warmer months of the year, the aroma might not last as long as it would in the winter time.