Sourdough Starter Jar Level Marker (Rubber Band & Pen)
Tracking your starter’s rise is one of the simplest ways to understand fermentation using our Sourdough Starter Jar Level Marker. This sourdough starter jar level marker makes it easy to see exactly how much your starter has grown between feeds.
The adjustable black rubber band fits securely around your jar, allowing you to mark the starting level before fermentation begins. As your starter rises, you can quickly measure activity and judge when it’s at peak strength. The included marker pen lets you add notes or highlight levels directly on the jar for even greater control.
A simple but highly effective tool for improving consistency and building confidence in your sourdough process.
Adjustable rubber band fits most starter jars
Easily track rise and fermentation activity
Helps identify peak starter readiness
Includes marker pen for added visibility and notes
Reusable and easy to clean
Material: Rubber (band), plastic (pen)
Colour: Black
Wipe clean after use
Store pen with lid securely closed
Avoid overstretching the band
Order by 4pm Monday to Friday and your order is dispatched the same day.
- Free UK delivery on orders over £50.
- Standard UK delivery: 1-2 working days.
- You will receive tracking by email as soon as your order is dispatched.
30-day returns. You have 30 days from receiving your item to request a return. Items must be unused, with tags, and in the original packaging.
- Approved refunds are issued to your original payment method within 10 business days.
- Starter cultures, perishable goods, custom items, gift cards and sale items cannot be returned.
- To start a return, email support@sourdoughsupply.co.uk. Returns sent without approval cannot be accepted.

Tools chosen by bakers, for bakers
At Sourdough Supply Co. we test every product in our own kitchens before it earns a place in the range. From proofing baskets to precision scoring tools, each piece is selected for durability, function and performance, because great bread starts with the right equipment.
Fast, careful UK shipping
Order by 4pm Monday to Friday and your order leaves our UK warehouse the same day. Standard delivery arrives in 1-2 working days, free on orders over £50. You will receive tracking by email the moment your order ships.


From our kitchen to yours
Sourdough Supply Co. is a small UK team of home bakers. Everything we stock is tested in our own kitchens, and if a tool does not earn its place, we do not sell it.
Questions about your bake? Email us and a real person will reply.






