WECK Sourdough Starter Jars

Authentic German WECK Glass Canning Jars — the gold standard for sourdough starters.

These jars are a favorite among bakers for good reason. The heavy, wide-mouth, no-lip design makes feeding, stirring, and maintaining your sourdough starter easy while keeping the sides and rim of the jar clean.

Each ¾-liter WECK jar (just shy of 400g capacity) includes a removable natural rubber gasket, allowing your starter to stay protected while still being able to breathe during active fermentation.

When you’re working with discard or ready to put your starter to sleep, simply replace the gasket and secure the stainless steel clips to create an airtight seal — perfect for refrigerator storage.

Why bakers love WECK jars:

• Wide mouth with no lip for clean feeding and mixing

• Ideal size for active starters and discard

• Breathable fermentation with gasket removed

• Airtight storage with gasket and clips attached

• Durable, thick German glass

Perfect for sourdough starters, discard storage, and long-term fridge resting.