1/2 oz - 4 oz Blue Glass Bottles, Round Bottles with Black Droppers 【Avoid light】Blue glass bottles provide a very professional display and are perfect for storing materials which are sensitive to degradation from light.Blue colored coated glass maintains liquids sensitive to degradation from light. Glass apothecary jars shelter photosensitive compounds from damaging UV rays. An essential for a health and wellness company where the majority of your products are packaged in glass dropper bottles. Perfect for cocktail bitters and other syrup flavors for mixed drinks.Jars are detachable and reusable,they can be cleaned and washed in warm soapy water.The dropper is made of glass and will not interact with oils or chemicals. 【Sealing and leak proof】 The 4-ounce glass dropper bottle has better sealing performance after being fired at 1200 ℃.The threaded black bottle mouth increases the external friction force, making it fit tightly and preventing liquid leakage.…