Container for food products and method to manufacture it

A method to manufacture a container for food products, the container including a tray made of a polymer material;

• wherein the tray has a bottom wall, a side wall, and an upper peripheral edge;
• the method comprising:
• providing a polymer material band delimited by two faces;
• providing each face of the polymer material band with a non-stick material which is different from the polymer material of the polymer material band;
• obtaining the tray starting from a polymer material sheet cut from the polymer material band;
• superficially treating the upper peripheral edge of the tray in order to remove the non-stick material;
• and
• after the superficially treating, applying a glue layer directly on the polymer material of the upper peripheral edge of the tray to lock a closing lid on the upper peripheral edge of the tray.