12 bottles 10 ml Boston Round Amber Bottles With Orifice Reducers and Caps. All Amber colored glass bottles hold 10 milliliters/0.35 ounces of liquids and/or essential oils. If you will be mixing your own liquids or oils to sell or give as gifts, have no fear! The first time you put the orifice reducer in and then twist on the cap, you will get a complete and professional seal on all your bottles. All glass bottles are reusable and will NOT retain odors from any previous uses. Just wash in warm soapy water. The small size of these amber bottles makes them ideal for taking with you while you're on the go. They will comfortably fit in just about any pocket or simply toss in your purse.