How specificly do these jars work as a sourdough starter jar?

The fact that the mouth of the jar is larger makes it easier to add the flour and water during the "feeding" process. It has two different lid options. When I store in the refrigerator for a week, I use the plastic lid. I have shared my starter with friends and put it in these jars and use the glass lid with the clips so it is more secure on the trip to their home (I also give the plastic lid for when they store in the refrigerator). I sent some to my daughter who is enjoying them for her sourdough starter.

How large is the opening and how tall is the jar?

The jars I purchased are 9cm for the opening and the height of the jar is 15cm.

Can the seal be removed from the lid to allow for gas to escape as the starter ferments?

Don’t use the clips and that will allow for gas to escape

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Description

🌿 Seal freshness, style, and sustainability in every jar!

ROBUST RELIABLE SEAL - Keep your sourdough starters, juices, and pickles fresher, longer with airtight rubber gaskets and stainless steel clips.
GENEROUS 1 LITER CAPACITY - Perfectly sized to nurture your sourdough starter or store large batches of homemade preserves without constant refills.
MICROWAVE DISHWASHER SAFE - Designed for the busy professional—easy cleanup and reheating without compromising jar integrity.
SUSTAINABLE STYLISH GIFT CHOICE - Ditch plastic and impress your eco-conscious circle with a chic, reusable glass jar that’s as thoughtful as it is practical.
VINTAGE ELEGANCE MEETS MODERN UTILITY - Elevate your kitchen aesthetics with iconic tulip-shaped jars that double as stylish décor and functional storage.

The Weck Tulip Jars 1 Liter (2 Pack) are premium, thick glass containers featuring an airtight wire clamp closure system with rubber gaskets and stainless steel clips. Designed for versatile use—from sourdough starters to pickling and juice storage—these eco-friendly jars are microwave and dishwasher safe, combining vintage charm with modern convenience. Their wide mouth ensures easy cleaning and filling, making them a durable, sustainable alternative to plastic storage solutions.

Specifications

Product Dimensions	3.88"L x 3.88"W x 5.75"H
Recommended Uses For Product	Canning, Dried pulses, Juice, Leftover food, Pickled vegetables, Sourdough starter
Special Feature	Air Tight
Container Shape	Tulip
Closure Type	Wire Clamp
Is Dishwasher Safe	Yes
Item Package Quantity	1
Item Weight	3.15 Pounds
Product Care Instructions	Microwave Safe
Item Volume	35.9 Fluid Ounces
Unit Count	1.0 Count
Is Microwaveable	Yes
Item Form	tulip
Manufacturer	Weck Jars
Number of Items	2
Size	Glass Lids and Keep Fresh Covers
Item Weight	3.15 pounds
Pattern	Jars, Glass Lids & Keep Fresh Covers
Shape	Novelty
Special Features	Air Tight
Batteries Included?	No
Batteries Required?	No
Number of Sets	1

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