1)Boston Cocktail Shaker Includes 2 pieces-mixing glass and shaker cup 2)They Fit Together Snugly So That Not Even A Drop Spill The Boston Shakers has a sleek European design. The larger base unit is made of stainless steel, while the slightly smaller half is made of thick, durable glass and stores inside the metal half. Calibrations on the glass are in both metric and imperial.This is the ...