Glass Sourdough Starter Jar with Rubber Ring

Custom manufactured, perfectly sized, straight-walled glass jar with a specially designed lid that keeps contaminants out but lets air in — plus a rubber o-ring to mark your starter’s pre-expansion level after feeds. Jar volume is 700 ml (which is a tad shy of 3 cups). Dimensions (with lid): 5.5″H x 4″Dia.