These are perfect for your car or a small room. The bottle is made of glass which has an ombre grey tint and the cap is bamboo, when supplied there is a small bung in the glass bottle, just remove the bung, replace the bamboo cap and give it a quick tip up to allow a small amount of fragrance to soaked into the cap which acts as the diffuser. Then hang wherever you like ! Every now and then repeat the process to ensure the cap doesn't dry out. Each bottle including cap is 5cm high x 4cm wide. If you spill any of the fragrance onto your car, wash immediately with warm soapy water. They are supplied in a little linen pouch which can be re-used. Refills can also be supplied if required. They are available in the following fragrances: Adventure: Top notes of blackcurrant, bergamot, Calville Blanc apples and Louisiana Birch. Midnight Orchid: Sensuous blend of black truffle, Ylang, Bergamot & blackcurrant. Flower Explosion: Orange balm & bergamot, lily of the valley, jasmine & muguet, sandalwood, patchouli, musk & amber. Baies: Summer berries, roses, freesia, & blackcurrant. Havana Orange Blossom Black Cherry Lemon & Lavender Black Pomegranate Vanilla Moonlight