Boston Round 8oz Plastic Bottles have a rounded shoulder design that has proven over the years to be one of the most reliable for containing almost any liquid or solid. Use Amber Boston Rounds for light-sensitive materials. The pump, when fully depressed, has the ability to be screwed down. They are perfect for DIY lotions, creams, oils, soap, and other cosmetic formulations. With a different top the bottle can also be used for spraying essential oils, cooking oil, massage oils, beauty products, and other liquid compounds or formulas. The Amber PET /BPA free Boston round bottles come with black pumps in a 2 pack. These bottles are ideal for essential oils, cleaning products, homemade cleaners, aromatherapy, organic beauty treatments or cooking in the kitchen. * Please press on paint pen a few times to get the ink flowing. Once its flowing you do not need to keep pressing. Try to write on something else to test before using on chalkboard labels. The writing will dry semi-permanent and may be removed using isopropyl alcohol.