Can be hung or placed anywhere in your car. You control the strength of the scent by how much you disperse onto the wooden lid once the stopper has been removed. If you are also wanting to make your wardrobe & clothes smell that much better you can also hang these in there for an added scent boost! Each time you require more fragrance simply disburse more by tipping more onto the wooden lid (keeping the bottle closed). Our Mini Car Diffusers are available in; Guava Lychee Sorbet 1 Million (Masculine) Whiskey, Wood-Smoke & Leather (Masculine) Whipped Vanilla Buttercream Fresh Linen Wild Currant & Sandalwood Brandied French Pear Summer Passion Smoked Honey & Sandalwood Cranberry & Muscadine