The developments are designed to ensure that customers can be confident that the food products are hermetically sealed to minimise spoilage and increase safety for multi-portion products.

The Color Reveal indicator feature provides consumers assurance of complete bag closure to keep foods fresher, longer, the company said when introducing the new features.

One side of the traditional zipper is tinted, while the opposite side is translucent. When the consumer closes the package, the colour shows through the translucent part, indicating that the package is completely sealed.