Open any kitchen drawer in any household that has tried to reduce its waste, and you will find too many cotton tote bags. They are the unintended consequence of every conference, every brand pop-up, every well-meant book launch. You collected them. You did not need them. They are still in the drawer.
Here is the question nobody quite asks: are these bags doing any good at all?
The uncomfortable maths
Several life-cycle studies have looked at the environmental cost of producing different types of bag. They generally agree on the rough shape of things, even where they disagree on the precise numbers. The conventional plastic carrier bag has a low environmental cost to make but a high cost in waste. the Ellen MacArthur Foundation’s circular economy overview A cotton tote has a high cost to make, cotton is thirsty, energy-intensive and chemical-heavy, but a low cost in waste, if you reuse it.
The Danish Environmental Protection Agency, in a much-cited 2018 study, suggested that a conventional cotton bag would need to be used around 7,000 times to match the climate impact of a single plastic carrier bag, if compared on overall environmental impact. Other studies put the number lower, somewhere between 130 and 400 uses, depending on what you measure and how.
The honest summary is: a cotton tote needs to be used hundreds of times to be better than a plastic bag, and thousands of times to be unambiguously the best option. Most cotton totes are used twice and then live in a drawer.
So is plastic better?
No, not really, but the answer is more nuanced than the slogan version. Plastic carrier bags have an end-of-life problem, they shed microplastics, they litter, they choke wildlife, they sit in landfill. They are also genuinely cheap to make and use very little material.
The cleanest answer is this: the best bag is the one you already own and will use a lot. If that’s a battered cotton tote that’s been to a dozen shops, brilliant. If it’s an old plastic bag-for-life you’ve had for two years and reused as a bag-for-life, also fine. The worst bag is a new one you didn’t need.
How to actually do well by a cotton tote
If you have a cotton bag and want it to pull its weight environmentally, the path is straightforward. Use it. Use it a lot. Then use it more.
- Keep one in your coat pocket, one in your handbag, one in the boot of the car. Out of sight is unused.
- Use it for everything, groceries, the library, gym kit, taking lunches to work, carrying things to the charity shop.
- When it wears out, repair it before replacing. Most totes have one or two failure points (the strap join, the bottom corners). A few stitches with strong thread doubles the life.
- When it really is finished, cut it into rags for cleaning. The cotton lives on.
The polyester problem
Some “eco” tote bags are actually made of recycled polyester. These have lower production impact than cotton, but they shed microplastics in the wash. If you have one, wash it less often, line-dry it, and the same rule applies: use it many times.
The other style, woven polypropylene “bag for life” bags from supermarkets, actually score quite well in lifecycle studies because they’re built to last for many uses with relatively low production cost. The catch is the same: they only score well if you actually use them many times.
What about jute, hemp and other natural fibres?
Jute bags are heavier per use but generally lower-impact than cotton to produce. Hemp is similar, lower water use than cotton, sturdier than most. Linen falls somewhere in the middle. None of these are commonly given out for free at events, which is, in itself, a reason they tend to be the right bag if you’re buying one.
If you’re going to buy a single bag and use it for years, jute or hemp is probably the lowest-impact choice. If you already have cotton totes, the lowest-impact choice is to use them.
The “I have too many” problem
Most people reading this don’t have too few bags. They have a small mountain of them, and a guilty sense that throwing them out is wasteful. So is hoarding them. Here’s a sensible exit:
- Pick the five or six best, most-loved bags. Keep these in active rotation.
- Donate the rest to a charity shop, a foodbank, or a community kitchen. All of these need bags.
- Stop accepting new ones. At events, conferences, brand launches and so on, decline the bag. You don’t need it. The point isn’t to be rude, just clear.
The wash cycle matters too
One factor rarely discussed in tote bag debates is how often you wash them. A cotton bag used regularly for groceries needs an occasional wash, because raw produce, the bottom of a milk bottle, and the residue of a leaking salad bag all leave traces. The recommendation is roughly once a month for general use, more if you carry raw meat.
The energy cost of washing a cotton bag is small per wash, but if you’re washing it weekly on a hot cycle, the cumulative impact adds to the production footprint. A cold wash, line-dried, is the right answer. So is grouping the bag wash with a load you were doing anyway.
What about the bag drawer?
Almost every household reading this has a “bag drawer”, the place where shopping bags accumulate, get folded badly, and then sit. The drawer is the unspoken reason most reusable bags don’t pull their environmental weight. The bag in the drawer is identical, in functional terms, to no bag at all.
The solution isn’t a system. It’s a simple rule: every bag has to be in active circulation between trips. Use it, bring it home, hang it on the hook by the door, take it on the next trip. The bag drawer is for spares only.
A reader called Joanna shared that her household reduced their bag count from 23 to 5 over a single afternoon by donating the surplus to a charity shop. The five remaining bags get used on rotation. Six months later, she reports that the smaller number works better, because the bags are kept where they’re needed instead of stuffed away.
The honest verdict
Cotton tote bags are better than plastic carriers if you use them a lot. They are worse than plastic carriers if you don’t. The bag itself is morally neutral. The behaviour around it is where the difference lives.
The greenest tote bag isn’t the one with the right slogan or the right fabric. It’s the one that comes shopping with you next Saturday, and the one after, and the one after that.
Frequently Asked Questions
How many times do I need to use a cotton tote for it to beat a plastic bag?
Estimates vary, but most studies suggest at least 130 to several hundred uses to match a plastic bag on overall climate impact. The number is much higher (thousands) for full environmental impact including water use.
What's the best material for a reusable shopping bag?
For low-impact production, jute or hemp tends to win. For practicality, woven polypropylene bag-for-life types do well if used many times. The "best" bag is usually the one you already own and reuse a lot.
Should I throw out my existing tote bags?
No. Throwing them out wastes everything that went into making them. Use the ones you have, donate spares to charity shops or community kitchens, and stop accepting new ones.
What about plastic bags-for-life?
They actually score reasonably well in lifecycle studies, but only if used for many trips. Used once and binned, they're worse than a regular plastic carrier.
Are tote bags hygienic for raw food?
Wash them every few weeks on a normal cycle. If carrying raw meat or fish, keep a dedicated bag for that purpose so cross-contamination isn't an issue.
How do I stop accumulating new tote bags?
Politely decline them when offered at events, shops or brand launches. Carry one in your bag so you're never caught short and tempted to take a new one.
