The Ultimate Guide to Selecting and Using Glass Jam Jars for Your Homemade Preserves

The delightful tradition of crafting homemade preserves is a cherished one passed down through generations. Central to this tradition is the utilisation of glass jam jars which not only store but also beautifully showcase your homemade delights. This guide endeavours to provide a thorough insight into selecting and employing glass jam jars to ensure your homemade preserves retain their freshness and flavour.



1. Why Glass?

   - Non-reactive Nature: Glass doesn’t react with the ingredients of your preserves, ensuring the purity and taste remain intact.

   - Transparency: The clear nature of glass allows for easy inspection of the contents and the condition of your preserves.

   - Reusability: Glass jars can be sterilised and reused multiple times, making them an eco-friendly choice.


2. Selecting the Right Jar:

   - Size: Opt for a size that matches the quantity you typically make. The 190ml panelled food jar or 1lb jam jars from JBC are excellent choices for standard preserve quantities.

   - Shape: Though round jars are traditional, square or hexagonal jars can save space and offer a contemporary aesthetic.

   - Lid Type: Choose airtight lids with robust seals to keep your preserves fresh. Metal or plastic lids with a sealing compound are often recommended.


3. Sterilisation:

   - Cleaning: Thoroughly wash the jars and lids with hot soapy water.

   - Heat Sterilisation: Submerge them in a boiling water bath for 10 minutes or place in an oven at 135°C for about 20 minutes.


4. Filling and Sealing:

   - Warm Jars: It's advisable to fill the jars while they are still warm to prevent cracking.

   - Head Space: Leave some space at the top of the jar to allow for expansion during the sealing process.

   - Sealing: Wipe the rim, place the lid, and screw the band down securely.


5. Storing Your Preserves:

   - Cool Down: Allow the jars to cool down before storing them.

   - Dark, Cool Place: Store your preserves in a dark, cool, and dry place to maintain their quality and extend shelf life.

   - Labeling: Label your jars with the contents and date of preservation to keep things organised.


6. Upcycling Your Jars:

   - Repurposing: Once your preserves are enjoyed, consider repurposing your jars for other uses such as storing dry goods, crafting, or as decorative elements.


Selecting and using the right glass jam jars is pivotal in ensuring the success of your homemade preserving endeavours. By adhering to the guidelines outlined in this guide, you're well on your way to enjoying and sharing your homemade preserves with friends and family for many joyful occasions to come.