Stainless Steel and Health
There are two stainless steel mixing bowls in my kitchen cupboard. One feels more solid and has aged gracefully with use, the scratches are almost absorbed into the worn smooth metal surface, and it remains a grayish stainless steel colour. The second, purchased at a discount store, has taken a distinct yellow tinge and is displaying tarnish, its surface seeming artificially glossy.
I understand now that there are different grades of stainless steel and the quality will affect how it wears and what toxins it may pass on to to food or liquids contained in it. How will this quality affect my choice of a stainless steel drink bottle? There are important features to think about when choosing a reusable stainless steel bottle
Stainless steel is always manufactured using chromium, because it is what makes steel “stainless”. Other elements are also added including nickel, nitrogen and molybdenum. These elements can leech into liquids, so it is very important that the bottle is made from high quality, 18/8 food-grade stainless steel – but also that you trust the manufacturer is telling the truth when they say what the bottle is made from. Some will claim to make the bottle from the thinnest and cheapest stainless steel they can in order to reduce manufacturing costs and hence pump up profits.
Other features are also important:
- Are the lids made from a BPA free plastic?
- Can you see sharp corners or joins inside where dirt and bacteria can build up?
- Is the thread around the screw top easily cleaned?
- Will the lid leak and can you buy a replacement lid without buying a whole new bottle?
- Does the manufacturer provide a guarantee?
Consider who the manufacturer is. Do they have a long history of quality, who are the real people behind the company and what is their story? In 2004, Klean Kanteen was the first company to make a water bottle from stainless steel. They have continued to lead the way with innovative stainless steel products. Another leading sports hydration company making high quality stainless steel bottles is Nathan, using a clever straw drinking mechanism. Perhaps the grandparent of all stainless steel is Thermos, whose name has become synonymous with insulated bottles for hot water. Many of us grew up taking “the thermos” on a picnic.
From an environmental point of view, is a stainless steel bottle more eco friendly than a plastic bottle? A Life Cycle assessment study published in the New York Times in 2009, considered the environmental and health impact of stainless steel bottle from the extraction and processing of its ingredients, to its manufacture, distribution, use and final disposal. It found that if your stainless steel bottle takes the place of 50 plastic bottles, the climate is better off.
From a human point of view, who made the bottle and was that person treated fairly and compensated for their time. This is the hardest criteria to judge because few of us can actually visit the factories in China where most of the bottles are made. We can at least always go to the manufacturer’s website and ensure they have published a statement about their factory and worker conditions. Again, as with most things in life, we have to make a judgement call on whether we trust the company and what they are saying.
Written by Tracey Bailey, Founder of Biome eco friendly retail stores.
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