@bearcat44

In your response to Jon, it is most likely that it would be cheaper to buy the gallon of undiluted antifreeze and a gallon of water, but Jon noted "convenience". To mix the two gallons of liquids correctly, you need a two gallon container to pour them both into and then to transfer back to the more easily handled one gallon size. For Jon, he is apparently willing to pay for the convenience of only buying what he needs. That is his choice as a consumer.