A refillable roller bottle will allow you to pre-dilute your oil blends so that they can be applied directly to the skin without messy drips or spills. Bamboo Lids. 10 colors. Perfect for use of Essential Oils, Perfumes Oils and Other Liquids. Carry Portable, Take your oils wherever you go with this travel size (10ml, 0.33 fl oz) In order to prolong the shelf life of your homemade essential oil blends, our roller balls are each filled with tumbled gemstone chips that prevent your handmade DIY oily mixtures from separating. When you want to use these bottles, you can pour out the mini stones out and wash them with cold water before use. Also you can use the roller bottles as perfume bottle. Size: Approx. Dia: 2 cm / 0.78 inch Height: 8.5 cm / 3.34 inch Material: Glass, Natural Stone, Bamboo Lids Package Includes: 10 Pieces Essential Oil Roller Balls Bottle Note: 1.Please allow 1~3 cm error due to manual measurement, thanks. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you.