The Plastic Soup Foundation grants certification to brands entirely free of microplastics, as denoted by the 'Zero Plastic Inside' logo. This emblem instantly indicates to consumers that the product is guaranteed to be completely devoid of microplastic ingredients.

Disclaimer: We include the nuances! 
It was a deliberate choice to filter in the nuances. This means we don’t just include certified accreditation but also unregulated terms and commonly used jargon. We chose to do this in order to gain a more rounded picture of each brand, aiming to enhance the validity and reliability of our understanding of their ethical stance.

Reference : plasticsoupfoundation.org