Glass preserving jars for either canning or freezing. Withstands heat of steam pressure canner and sub-zero temperatures of home freezer. Tapered sides for easy fill and removal with frozen products. Measurement markings in both cup/oz. and metric. 12 jars with lids and bands per case. In addition to preserving, these Mason jars are also great for serving, creative decor, and gift-giving. Sold by case only.