Round Dropper Bottles are supplied with attached glass dropper assemblies. Dropper Bottles are ideal for dispensing small amounts of liquid. Choose clear glass for maximum visibility or amber glass for UV protection for light sensitive products. Glass dropper bottles available in sizes from 1 oz (30 ml) to 4 oz (120 ml). Our round dropper bottles feature attached dropper assemblies with black polypropylene closures, rubber bulbs and straight point glass dropper tubes. The opening of tube tip has a 3.0 mm outside diameter.