... Clear boston round bottle 15ml, 30ml, 60ml, 120ml, 240ml, 1/2OZ, 1OZ, 2OZ, 4OZ, , 8OZ, good quality and competitive price A Boston round ... for closing with a screw cap. Boston round bottles, also called Boston rounds, are ... and sides. They are normally made of plastic, but are also manufactured from glass. ... round might hold one to two ounces (29.6 to 59.1 ml) of liquid, while medium-sized containers ...