Browse Hazards Learn News How grades work Check a product

Report an error

Grades are model-based estimates and products change. Tell us what is off and it goes straight into the human review queue.

Reporting on hydro-flask-hydro-flask-12-oz-outdoor-tumbler

What is wrong?Your email (optional, only so we can reply)

Check a product Browse Tools Hazards Learn News PFAS laws by state Brands Starter kits Home audit How grades work The dataset Manufacturer filings About Report an error Privacy Terms

PFAS scores are model-based estimates from product materials and publicly available data, not laboratory certifications. “Lower concern” and “no evidence of PFAS found” describe our review of available sources, not a guarantee. Always verify with the manufacturer for critical decisions.

Affiliate disclosure. As an Amazon Associate we earn from qualifying purchases. Some links on this site are affiliate links, and if you buy through them we may earn a commission at no extra cost to you. This never affects a product’s score.