These standards describe how we research, write and correct the guides on Poly Free Planet.
How we research
- We rely on published material specifications, manufacturer information and reputable public sources such as government agencies and professional bodies.
- We link to sources for factual claims that readers may want to check.
- We describe trade-offs and limitations alongside benefits.
- When something cannot be verified, we say so rather than guess.
What we do not do
- We do not publish star ratings, scores or rankings that are not backed by a documented method.
- We do not claim hands-on testing unless a guide states clearly that it took place.
- We do not describe products as certified, compostable, plastic-free or non-toxic unless there is evidence for the specific product.
- We do not accept payment for coverage. Any sponsored content would be clearly labelled.
Affiliate links and independence
Affiliate links help fund the site. They are labelled, and they do not determine which product types we cover or what we say about them. See the affiliate disclosure.
Corrections and updates
If you spot an error, please tell us through the contact page. We correct factual mistakes promptly and show an updated date on guides that have changed in substance.