What did the gallon milk jug look like in America before plastic came along?

Before plastic came into common use, gallon milk jugs in the United States were typically made from glass or metal.

Glass jugs were made of thick, heavy glass to withstand the weight of the milk and to prevent breakage. They had a wide opening at the top, which was sealed with a metal cap or a wax seal. Glass jugs were often embossed with the name of the dairy or milk distributor.

Metal jugs were made of tin-plated steel, which was resistant to corrosion and rust. They had a narrower opening at the top, which was sealed with a metal screw-on cap. Metal jugs were sometimes insulated to keep the milk cold. Both glass and metal jugs were often reusable and were returned to the dairy for cleaning and refilling.