Twist-off jars: pasteurization & sterilization
screwing jar

It is common to sterilize and/or pasteurize screw-top glass jars, also called twist-off jars. Do you know the difference between sterilization and pasteurization and what’s involved in each technique? 



Before use, we recommend you to clean the jars and their lids.

What are the differences between pasteurization and sterilization? 


Pasteurization and sterilization have the same objective: to preserve food

  • Pasteurization:

Pasteurization destroys some of the germs present in food and prevents any remaining germs from proliferating. The food is heated to a temperature between 62°C and 88°C for a specific period, followed by rapid cooling.

  • Sterilization:

Sterilization destroys all the germs in the food, including microbial spores. The food is raised to a high temperature, always greater than 100°C (usually around 120°C).

Remember to check that each product (jar, lid, etc.) can withstand the temperatures necessary for sterilization or pasteurization. If you’re not sure, please contact our Ebottles experts.


twist-off lid


How to avoid contaminatingthe twist-off lid?


The glass jar should not be overfilled to avoid contaminating the lid with the contents.
For example, for a small glass jar with an overflow capacity of 580ml:

  • For pasteurization, a headspace of roughly 5%is required; so it must not be filled to more than 551ml, which is 5% less than the overflow capacity
  • For sterilization, a headspace of roughly 9% is required; so it must not be filled to more than 527ml, which is 9% less than the overflow capacity


You can find all our twist-off jars and their metal lids here. For any other questions about twist-off jars, please contact us at!

You may also be interested in this other article about twist-off jars: "Twist-off jars: use & storage"



> Discover our range of food grade glass jars:

empty glass jar