Brand Rating
Klean Kanteen
OG of stainless steel water bottles — made from 90% post-consumer recycled stainless steel, B Corp, Climate Neutral, 1% for the Planet. Wide mouth compatibility, lifetime warranty. The downsides: expensive ($30-45 per bottle), heavy compared to plastic, and the "avocado green" aesthetic is polarising. Also, the market is very saturated (Hydro Flask, S'well, etc. — but KK is the most sustainable).
77/100
Hummlan Sustainability Score
77
out of 100
Sustainability Breakdown
1% for the Planet giving since 2008; stainless drinkware displaces single-use plastic pollution.
Bottles made from 90% post-consumer recycled stainless steel; lifetime warranty; durable refillable design.
Climate Neutral certified with a product Climate Label; recycled steel cuts embodied emissions; no SBTi targets.
Stainless steel avoids plastic leachates; Klean Coat finish and BPA-free construction.
Certified B Corp (2012) and 1% for the Planet member (2008); supplier and factory transparency.
Our ratings are "stern but fair", based on third-party certifications and EU Taxonomy + CSRD alignment. We prioritize verifiable data over brand marketing claims. EU Taxonomy and CSRD explain the framework backbone.
Klean Kanteen Products We Track
Our ratings are "stern but fair", based on third-party certifications and EU Taxonomy + CSRD alignment. Learn more about EU Taxonomy and CSRD.