Stainless Steel
Long-life, highly recyclable alloy that displaces single-use plastic.
What it is
Stainless steel is iron alloyed with chromium (and often nickel) for corrosion resistance. Food-grade 304 and 316 are the grades used in bottles, cookware and containers.
Why it matters
Production is energy-intensive, but the material lasts decades and is recycled at very high rates — over 85% globally. Impact per year of use falls fast the longer you keep it, which makes it a strong reusable choice.
Upsides
- Extremely durable; decades of service life
- Recycled at high rates and holds scrap value
- No plasticisers, BPA or coatings to degrade
- Typical new steel already contains substantial recycled content
Trade-offs
- High embodied energy — poor choice for short-lived items
- Nickel mining carries real environmental and labour issues
- Heavier and pricier upfront than plastic
What to look for on the label
18/8 (304) or 18/10 food-grade marking, no interior coating, replaceable lids and seals, and a repair or lifetime warranty.
Better or comparable alternatives
Compare stainless steel in a finished product
Material choice is only part of the decision. The same material can appear in very different products: compare composition, expected use and end-of-life options before treating it as a better replacement.
- Composition and sourcing
- Use the label guidance above to check the actual percentage of stainless steel, any blends, coatings or adhesives, and which component a certificate covers. A claim about one input does not describe the whole product.
- Use and maintenance
- Weigh the listed upsides and trade-offs against the job you need it to do. Check care instructions, repair options and whether a comparable item you already own could serve the same purpose.
- Disposal in your area
- Ask your local collection service about the finished item, not just its main material. Blends, coatings and attachments may change how it can be collected. Do not assume a recyclable or compostable claim applies to your household system.
Frequently asked
How many uses before a steel bottle beats a plastic one?+
Studies land in the 50–150 use range depending on the study boundary. Anything past a few months of daily use is a clear win.
Is stainless steel safe for acidic food?+
316 grade is best for salt and acid exposure. 304 is fine for everyday use but can pit under prolonged salt contact.