2 oz blue glass boston round bottles with black child resistant glass droppers can be used to package pharmaceuticals, chemicals, and more. The 2 oz glass boston round bottles are impermeable, preventing product alteration, and feature sloped shoulders and a narrow neck. Cobalt blue glass provides adequate UV protection, assisting with keeping your light-sensitive products maintained when storing. The black bulb glass droppers paired with these small glass bottles dispense in droplets for smooth application.