Used as a mailbox now, these silver milk boxes were on everyone’s porch steps. Growing up our dairy was Alderney Farms in New Jersey. Thick glass, with paperboard circle caps. You could get a dozen eggs, some cottage cheese. Leave the empties for the milkman to exchange for fresh cold bottles of milk. We still had delivery in the mid sixties. The delivery truck door had a sound when it’d slide. You can buy an old milkbox on ebay.