Choosing the right size and shape of glass jars is essential to take your recipe to the next level.

Based on the stickiness and thickness of the ingredients you want to mix and their quantity, you should choose the shape and size of your jars.

In general, we advise you to choose a jar that you can fill to 80% of its capacity.

If you try to fill it more, and the food is very thick, this can cause the jar to open up during mixing.

On the other hand, if you take a large jar and only fill it to 20% of its capacity, the food may simply stick to the top wall or the side walls of the jar.

BUT there are exceptions.

For example, if you want to make pesto or mix herbs with oil for dressings, you should fill the jar more than 80%. This is because herbs have a lot of volume, but once they are mixed, they lose it immediately. If you do not fill your jar properly by the time you blend the herbs, they will just stick to the walls of the jars or to the top.

The same goes for making nut butters. When the nuts are whole, they take up a lot of space in the jar, but as soon as they are blended into a cream, the contents of your jar will probably be halved.

Flat-walls jars are perfect for sticky and thick foods.

For example:

Curved-walls jars can be used for anything else, such as: