Unfortunately, there is no ‘correct’ way to dispose of products containing microplastic ingredients. We always recommend two options: the first is to send the product back to the manufacturer and describe why you decided not to use it and that you will stop buying this product as long as it includes microplastics; the second option would be to dispose of your products in the regular house-trash. It will be taken to a landfill or will be incinerated. These are not very environmentally friendly options but at least the microplastics will not end up in the ocean.
Check out our ZERO products lists to see which products are 100% free of microplastics!