Mason Type Sourdough Starter Jar with Thermometer

Mason Type Sourdough Starter Jar with Thermometer

500ml wide-mouth mason jar with stick-on thermometer. Purpose-built for sourdough starter maintenance.

This is the jar we include in all our starter kits and bundles — and the one we use ourselves. At 500ml it is the ideal size for regular feeding cycles: large enough to allow your starter to double or triple without overflowing, compact enough to sit comfortably on a kitchen bench or in the fridge.

The wide 86mm mouth makes feeding, stirring, and scraping straightforward with no mess. The transparent glass lets you monitor activity, track the rise, and spot the peak without opening the lid. The stick-on thermometer strips to the outside of the jar and gives you a continuous read of the internal temperature — keeping your starter in the ideal 20–25°C fermentation range has never been easier.

Made from durable tempered glass. BPA free. Dishwasher safe. Comes with a metal lid and screw band. There is also a heavy-duty waterproof sticker included if you want to give your starter a name.

Note: this jar does not include a sourdough starter. To add one, visit our Sourdough Starter Kits.

Main features

• 500ml capacity — ideal size for regular starter feeding cycles
• 86mm wide-mouth opening for easy access, feeding, and cleaning
• Stick-on thermometer for continuous temperature monitoring
• Transparent tempered glass — monitor starter activity without opening
• Includes metal lid, screw band, and waterproof name sticker
• BPA free. Dishwasher safe.

Weight: 292g (lid on), 270g (lid off)
Dimensions: 86mm width × 120mm height
Volume: 500ml / 1 pint / 16oz

Don't Have a Starter Yet?

• Organic Wheat Sourdough Starter – Live – our most popular starter. Born in Australia in 2017, active and ready to feed on arrival.
• Organic Rye Sourdough Starter – Live – a bold, full-flavoured rye culture originating from Poland. Maintained in Australia since 2014.
• Organic Wheat Sourdough Starter – Dehydrated – same wheat culture, dried for a longer shelf life. Ready to activate within 48–72 hours.
• Organic Rye Sourdough Starter – Dehydrated – same rye culture in dried form. Shelf life up to 12 months.

Complete Your Starter Setup

• Silicone Starter Mixing Spatula – designed to mix and scrape starter cleanly from jar walls.
• Bamboo Flour Measuring Scoop – measure and add flour to your starter quickly and cleanly.
• Replacement Lid and Band Set – spare lid and screw band for this jar.
• Bundle #1 – Sourdough Starter Bread Set – starter, jar, and spatula together at a bundled price.

Helpful Guides

• Step-by-Step Starter Feeding Guide – how to feed your starter correctly with pictures.
• Sourdough Starter Maintenance FAQ – answers to the most common starter questions.