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. BPA-free.