Metals
Stainless Steel
Lasts generations, 100% recyclable
Stainless steel (most commonly 304 grade, or 18-8/18-10) is one of the most durable and recyclable materials available. It lasts generations under normal use, is 100% recyclable without property loss, and about 60% of stainless steel products already contain recycled content. A chromium layer self-repairs scratches through passivation.
Sustainability benefits
- 100% recyclable without any loss of original properties
- Lasts generations — minimizes replacement and consumption
- ~60% already contains recycled content
- Self-repairing chromium layer resists corrosion
- Food-safe and non-leaching for most people
Drawbacks to consider
- Energy-intensive and polluting manufacturing process
- Can release trace nickel — problematic for nickel-sensitive individuals
- Heavier than plastic alternatives
What to look for
Look for 304 grade (18-8 or 18-10) for food containers and cookware. If you have a nickel allergy, consider nickel-free 200-series alternatives. Higher grades like 316 offer extra corrosion resistance.
How stainless steel affects a product's score
Stainless steel scores among the highest of any material. It earns 5/5 on durability (effectively permanent), 4/5 on end of life (highest real-world recycle rate), and 3/5 on materials as a natural low-impact material. Products made primarily from stainless steel consistently score well across all dimensions.
Scores are computed from four dimensions: materials, durability, end of life, and packaging. Each is scored 1–5 using transparent, open-source rules.