4 oz blue glass boston round bottles with black treatment pumps offer a stylish, clean look for various products. The cobalt blue glass boston round bottles are impermeable, preventing product alteration, and offer adequate UV protection for light-sensitive products. The black 22 mm treatment pumps matched with these blue glass bottles dispense .50 ml of product per pump. Select these blue boston rounds with black pumps for packaging cosmetics, skincare products, and more.