ChefLand New 10ml Cobalt Blue Glass Roll on Empty Refillable Bottles with Metal Balls and Black Cap Perfect for Perfumes Essential Oils and More, Comes with One 3ml Plastic Dropper, Pack of 12 SET CONTAINS - Master pack of 12 Cobalt blue, frosted glass roll on bottles with a black cap for a secure and leak free seal. Perfect for filling with perfume, essential oils or cologne. Try applying a relaxing coconut and lavender blend to help you wind down before bed, or stay on point with a dash of a mental clarity blend using Rosemary, lemon and cypress. UNIQUE - Create samples of your personalized aromatherapy blends and custom-made scents in these adorable bottles for clients in your massage, beauty or hair salon or aromatherapy or alternative medicine practice. EASY FILL - Simply remove the roller ball lid, add a few drops of your chosen essential oils using the dropper provided and mix with a desired base oil. Select almond oil, sandalwood, myrrh or Frankincense for a variety of beneficial effects and benefits. It couldnt be easier to create your own blends! SLEEK AND COMFORTING - The roller ball is designed using a special type of metal for more efficient and smooth application. Relax - Your 12 rollerball refill bottle package will be delivered to you in a solid box so as to prevent breakage.