The blue glass came as a bi-product, in production, the sand from Lake Michigan turned blue in the glass making process. Production started in the mid 1800s. Before the age of freezers the housewife preserved all her fruit, pickles and vegetables in these jars. Therefore all kitchens had lots of these. The most popular sizes were the Half Gallon, the Quart and the Pint. The Iconic ball mason jars look great on shelves just as display, or used as storage. The Zinc lids have milk glass inner linings, so they are safe to use for foodstuffs. Used vintage condition. Size - W9.5 x H18cm