Cruelty Free

The bathroom cabinet is the easiest place to cut plastic out of your life. It’s also the place where most eco swap advice falls apart, which is why so many people have a half-empty shampoo bar sulking at the back of a drawer.

Shampoo bars that refuse to lather. Deodorants that tap out by 11am. Swaps that feel like a downgrade dressed up as virtue. This isn’t that list. Here’s what’s worth switching, what to expect, and how to do it without throwing out half a shelf of products you’ve already paid for.

Why the bathroom is the right place to start

The British Beauty Council reports that the beauty industry produces over 120 billion units of packaging each year, and most of it never gets recycled. A 2023 report from the British Beauty Council put the recycling rate for cosmetic packaging at around 9 percent in the UK, which means most of what you drop in the recycling bin from your bathroom ends up in landfill or incineration anyway.

That’s the problem worth solving, and the bathroom is the obvious place to solve it. Bathroom products are among the most repeatable purchases most people make. Shampoo every few weeks. Moisturiser every couple of months. Change the format of one of those, and the impact compounds with every reorder.

In the UK, around 520 million shampoo bottles are thrown away every year. That single category, changed, would be a meaningful shift. And shampoo is where this usually starts.

The swaps that work. And the ones that don’t.

Shampoo bars: yes, if you buy the right one

A well-made shampoo bar replaces two to three bottles of liquid shampoo and produces zero plastic waste. The environmental case is clear. The performance case took a while to catch up, but it’s caught up. One bar lasts longer per wash, weighs less to ship, and lives quite happily on a soap dish. You can find pH-balanced bars in our Shampoo edit.

The caveat matters. Not all shampoo bars are equal. Plenty of the first-wave bars used saponified soap bases with a high pH that roughed up the hair cuticle, left residue, and caused the lather problems that put people off the whole category. pH-balanced syndet bars, made with mild synthetic detergents rather than soap, behave far more like a conventional shampoo. According to a 2014 review in the International Journal of Trichology, syndet cleansers are gentler on both hair and scalp than traditional soap formulas.

Look for the distinction when you buy. Give any new bar three to four washes before you judge it. The scalp adjusts.

Conditioner bars: yes

Easier transition than shampoo. Conditioner bars melt on contact with warm water and distribute much like a liquid conditioner. Less adjustment, same plastic saving. Browse the Conditioner range.

Solid soap and body wash bars: yes, and easy

The lowest-friction swap in the bathroom. A good soap bar with moisturising oils performs about as well as most liquid body washes, produces no plastic waste, and lasts longer. No adjustment period. Start here if you’ve never swapped anything before. The Soaps and Cleansers edit is a good first port of call.

Refillable deodorant: yes

The category has come on considerably. Refillable aluminium deodorants with cardboard or pulp refill inserts now perform as well as conventional roll-ons for most people. The upfront cost is higher and the ongoing cost is lower. See the Refillable Deodorant range.

Natural deodorant: worth trying, with care

Aluminium-free natural deodorants work for many people but not everyone. If sweating is a concern, test during a quieter week rather than committing on a high-stakes one. The switch usually takes two to three weeks as the body adjusts. A refillable conventional deodorant is the better answer if the natural version doesn’t hold up for you.

Reusable cotton pads: yes, immediately

Single-use cotton pads are a small but constant source of waste. Reusable cloth rounds wash in with the normal laundry and replace the disposable version entirely. One pack of ten lasts years. The shortest payback period on the list.

Bamboo toothbrushes: yes

The British Dental Association recommends changing your toothbrush every three months. That’s a lot of plastic across a population. Bamboo handles with nylon bristles are the practical swap. The bristles still go in general waste, but the handle composts. Fully compostable bristles exist but don’t clean as well, which is a trade-off worth knowing about.

Refillable skincare: prioritise this over format swaps

For moisturisers, serums and cleansers, refillable schemes tend to land a bigger win than switching format entirely. A glass jar refilled ten times is a better outcome than ten compostable single-use alternatives. Look for brands running active refill programmes rather than brands that simply use recycled packaging. The Refillable Skincare edit curates these.

What doesn’t work yet

Mascara, most foundations, and complex multi-component products. The packaging problem on these hasn’t been solved at scale. TerraCycle runs collection schemes for some brands, which is currently the best option. Buying less, buying better, and using products fully before replacing them does more here than any packaging swap.

How to switch without wasting what you’ve already got

The most sustainable thing in your bathroom cabinet is a product you’ve already bought.

Use it up first. The manufacturing cost is already sunk, and chucking a half-full bottle to replace it with something greener is the wrong maths. When a product runs out, replace it with the better version. Start with the things that cycle fastest: shampoo, body wash, soap, cotton pads. Most repetitions, fastest payback. For a similar approach applied to your wardrobe, see our beginner’s fashion guide.

Keep a list. When something runs low, check whether there’s a better format or brand before you reorder the same thing on autopilot. That pause is where most of the change actually happens.

What to buy when the time comes

Every product in the Beauty and Self-Care category on Ziracle has passed the same bar: kind to skin, honest about ingredients, and made with the planet in mind. For eco beauty specifically, that means plastic-free or refillable packaging, formulations without unnecessary synthetics, and brands that are transparent about their supply chain. We also prioritise brands certified Cruelty Free and products made with Organic ingredients where relevant.

The formats to look for: solid bars for hair and body, refillable deodorant, reusable cotton rounds, and skincare brands with active refill schemes. If you want to keep going down this rabbit hole, read our guide to eco swaps for home next, or our rundown of the best zero waste beauty brands.

You now know which swaps are worth making and which ones aren’t ready yet. Next time something runs out, you know exactly what to replace it with.Ready to shop? Browse our edit of Refillable beauty to find products that have already passed the standard.

FAQ

The bathroom is one of the easiest rooms in the house to clean up. Most of us reach for the same few products most days, which means a handful of smarter swaps can cut a surprising amount of plastic out of your life without asking you to overhaul how you live. Shampoo is a good place to start.

A household of four getting through a bottle of shampoo every two months will go through roughly 240 bottles in a decade. Scale that up across the UK and the numbers get harder to ignore. A 2017 Guardian investigation reported that more than a million plastic bottles were bought globally every minute, a figure projected to keep rising. Most of those bottles end up in landfill, incinerators, or the ocean. A shampoo bar, by contrast, arrives in paper or compostable wrap and disappears down the drain as water by the time you’ve finished it.

Zero-waste hair care is the simple idea that you should be able to wash your hair without generating a new piece of plastic every few months. The products are the best they’ve ever been, the format travels well, and the savings stack up quickly. Here’s how it works, why it’s worth switching, and how to make the move without ruining your hair on the way.

What zero-waste hair care actually is

Zero-waste hair care covers any product designed to wash, condition or style your hair without relying on single-use plastic packaging. The best-known format is the solid shampoo bar, which looks a little like a bar of soap but is formulated specifically for hair. You wet the bar, rub it directly onto your scalp or between your hands, and work the lather through as you would with a liquid shampoo. Browse the Shampoo edit for options.

Conditioner bars, solid styling pastes, refillable glass dispensers and compostable sachets all sit under the same umbrella. The common thread is that the packaging either disappears entirely or goes back into a reuse cycle. Most bars arrive wrapped in a paper band, a card sleeve, or a thin compostable film. Some are shipped in nothing more than a cotton pouch.

The format isn’t new. Solid soaps have been used for thousands of years, and solid shampoos were the norm in most households until liquid detergents took over in the mid-20th century. What’s changed is the formulation. Modern bars use mild surfactants, plant oils and botanical extracts that give you the lather, slip and finish you’d expect from a premium liquid shampoo, without the water content and without the bottle.

A short history of the shampoo bar

Washing hair with a solid is older than the bottle. Liquid shampoo as we know it took off in the first half of the 20th century, and by the 1940s the bottle had become the default format in most Western bathrooms. The bar stuck around in one niche in particular: travellers, soldiers and outdoor-sports communities kept using solid shampoos because they were lighter, more durable and harder to spill.

Over the last two decades the bar has come back into the mainstream, pulled along by the zero-waste movement, rising awareness of single-use plastic, and a surge of independent beauty brands. What used to be a camping essential is now a bathroom essential, and the range on offer has moved well beyond a single all-purpose bar. You can find bars for fine hair, coarse hair, curly hair, oily scalps, sensitive skin, colour-treated hair and almost every other use case a liquid shampoo can cover.

The environmental case for switching

The core argument for zero-waste hair care is the packaging. A typical bottle of shampoo is largely water by weight, which means you’re paying to ship water around the world, bottle it, and throw the bottle away. A shampoo bar has almost no water in it, which compresses the same number of washes into a fraction of the size and weight.

The shipping maths are striking. One shampoo bar can replace two to three bottles of liquid shampoo, and a single shipping pallet can carry several times more bars than bottles for the same weight. Less water, less plastic, fewer trucks, lower emissions. Packaging-focused guidance from WRAP has repeatedly flagged beauty and personal care as one of the fastest-moving categories for single-use plastic, and one where lightweight, concentrated formats offer the clearest path to cutting it out.

A 2020 study by the British Beauty Council found that the UK beauty industry generates over 120 billion units of packaging annually, with most of it non-recyclable in standard kerbside collection. Every bottle that never gets made is plastic that never needs to be dealt with downstream.

A typical bottle of shampoo is largely water by weight. A bar almost entirely isn’t.

What it does for your hair

The environmental case is the headline, but the formulation gap between shampoo bars and conventional liquid shampoos is narrower than most people expect, and in places it runs the other way. Many mass-market liquid shampoos rely on sulphates like sodium lauryl sulphate (SLS) and sodium laureth sulphate (SLES) for their thick foam. The American Academy of Dermatology notes that sulphates are effective cleansers, but can be drying or irritating for people with sensitive skin, eczema, rosacea or colour-treated hair.

Most well-formulated shampoo bars skip SLS and SLES in favour of milder surfactants like sodium coco-sulfate or decyl glucoside, combined with plant oils and butters that condition as they clean. A 2015 review in the International Journal of Trichology found that syndet cleansers using milder surfactants are gentler on the hair cuticle and scalp than traditional soap-based formulas. Bars also make it easier to avoid the silicones, synthetic fragrances and polymer thickeners that stack up in many liquid shampoos, because there’s less room in the formulation for filler ingredients.

There’s a transition period worth being honest about. If you’re moving from a silicone-heavy conventional shampoo to a bar, your hair can feel waxy or limp for a week or two while the coating you’ve built up washes out. A cider vinegar rinse (a tablespoon of apple cider vinegar in a mug of water, poured over and rinsed out) can speed that up. After the adjustment, most people find their hair feels lighter and looks healthier, and many can stretch washes further apart than before.

How to use a shampoo bar

The technique is simple, but the first few washes go better if you know what you’re doing. Wet your hair thoroughly. Wet the bar. Then either rub the bar directly onto the top of your head, working it along the hair from root to tip, or rub it between your hands to build a lather and apply that to your scalp. Work the lather in with your fingertips, massaging the roots rather than scrubbing the lengths, then rinse thoroughly.

If your water is hard, you may find the bar lathers less generously than it does in soft-water areas. A quick prep wash, rinsing your hair in plain water for longer than usual before applying the bar, helps. Some people follow with a solid conditioner bar. Others find the bar alone is enough, especially with shorter hair. Browse the Conditioner edit for options if you want to try one.

Storage is the one area where bars ask a little more of you than a bottle. Let the bar dry between uses. A draining soap dish, a bamboo tray or a small tin with holes works well. A bar left in a puddle will dissolve far faster than one stored dry, and you’ll get through your supply much sooner than you need to.

Shampoo bars travel better

If you travel, the bar format is practically made for your wash bag. UK airport security rules, set by the Civil Aviation Authority, limit you to containers of 100ml or less in your carry-on for liquids, gels and aerosols. Solid shampoo bars are none of those things, and they don’t count against the allowance. You can pack a full-sized bar in your hand luggage and skip the clear plastic bag entirely.

The weight savings are real for longer trips too. One bar, which might weigh 50 to 80 grams, can cover the same number of washes as a couple of travel-size bottles plus a full-size bottle at destination. No leaks, no airport friction, no last-minute rush to buy a replacement from a hotel gift shop.

Longevity and value for money

The upfront price of a shampoo bar is usually higher than a supermarket bottle of shampoo, and that comparison is where a lot of people lose confidence in the switch. The full-cost picture looks different. A well-made bar will typically last for 50 to 80 washes, which is two to three bottles of liquid shampoo depending on the brand. Factor in the concentration, the packaging savings and the longer time between purchases, and bars generally come out ahead on price per wash.

They also take up a fraction of the cupboard space. A small shelf that used to hold three bottles can hold a six-month supply of bars stacked into a tin. If you’re living in a smaller home, or trying to keep the bathroom simple, that matters more than it sounds.

Progress, not perfection

Zero-waste hair care is one of the lowest-friction swaps in the zero-waste playbook. The products work, the environmental case is strong, the travel case is better, and the cost case holds up once you factor in how long the bars last. You don’t have to get every product in your bathroom right on day one. Switch the shampoo. See how it feels. Then think about the conditioner, the body wash, the toothpaste tablets and the rest of the shelf.

For the broader picture, read our guide to eco swaps for beauty and our breakdown of microplastics in cosmetics.

Every brand in the Beauty and Self-Care category on Ziracle has passed the same standard: honest ingredients, transparent formulation, and packaging that takes the environment seriously. For zero-waste hair care specifically, filter by Plastic Free or Organic to find bars and refillable options from brands that work this way by default.

Ready to switch? Browse the Hair Lab edit and pick the bar that suits your hair type.

FAQs