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.
Our ratings are "stern but fair", based on third-party certifications and EU Taxonomy + CSRD alignment. Hummlan does not sell products and earns nothing from recommending brands — ratings are independent. Learn more about EU Taxonomy and CSRD.