Plastic jars have a lot of applications and are widely used in many industries, today I want to show you the answer about "what is double wall plastic jars?" in a simple way. Since you mentioned the double wall plastic jars, you probably already know the single wall jars, the difference between them is the number of walls, no doubt. First, we drew a picture (right) about double wall jar to help you understand the basic structure.
This jar has two plastic shells (inner wall and outer wall), which means the jar's wall is a little bit thicker compare to regular jars, and it will give your products more protection from outside, based on this feature, these two shells can be used in different materials to make, like PP, or our PS material double wall plastic jars.