At the end of the season, the cans were varnished to prevent rusting during storage and shipping. The introduction of enameled and then aluminum cans eliminated this step.
At first labelling was done by hand which was both labour intensive and costly. A thin line of wax was used to adhere the label to the can. Later, the labelling machine revolutionized packaging, intricately applying glue and a label to each can at high speed.