If you love the warm, lasting scent of a reed diffuser but find yourself replacing the whole bottle every few months, it's time to discover a better way. Reed diffuser refills are the simple, sustainable, and cost-effective solution that lets you keep your favourite fragrance going — without the waste, and without the cost of buying a brand new diffuser every time.
At Marsden & Whittle, refills have always been part of how we do things. And this World Earth Day, we're proud to introduce our biggest refill yet — the new 500ml Reed Diffuser Refill — alongside some exciting news about our Mix & Match Multi-Buy offer.
What Is a Reed Diffuser Refill?
A reed diffuser refill is simply a bottle of fragrance oil designed to top up your existing reed diffuser once it runs dry. Rather than buying a whole new diffuser — glass bottle, reeds, packaging and all — you simply refill the bottle you already have and swap in a fresh set of reeds.
It's a small change with a big impact. By choosing to refill rather than replace, you're reducing glass consumption, cutting down on packaging waste, and helping to lower your carbon footprint — all while keeping your home smelling exactly the way you love it.
Our Reed Diffuser Refills: Now Available in Two Sizes
We offer reed diffuser refills in two sizes, so you can choose the option that works best for you.
100ml Reed Diffuser Refill — £16
Our 100ml refill is the perfect top-up for your existing Marsden & Whittle reed diffuser. Each bottle comes complete with a replacement set of four fibre reeds and a small funnel for easy, mess-free refilling. With a typical lifespan of around 12 weeks, that works out at just 19p per day to fragrance your home — exceptional value for a luxury scent experience.
500ml Reed Diffuser Refill — £50 ★ New for 2026
For those who want to go further, our brand new 500ml Reed Diffuser Refill is our biggest and most eco-friendly option yet. With enough oil to fill up to five diffusers, the 500ml refill lets you fragrance your home for as little as 12p per day — making it outstanding value as well as the most sustainable choice we offer. The 500ml refill is supplied as pure fragrance oil, ready to pour into your existing diffuser using your funnel.
Both sizes are available in all 18 of our signature scents, and both are supplied in clear PET fully-recyclable plastic bottles with paraben free oil.
Save £5 With Our Mix & Match Multi-Buy Offer
All of our refill sizes are now part of our Mix & Match Multi-Buy offer. Pick any two products from our refills, reed diffusers, room mists, candles, hand and body washes, and lotions — in any combination — and save £5.
Whether you want to stock up on your favourite refill size, mix two different scents, or combine a refill with another product from our range, the saving applies. It's our way of rewarding you for shopping sustainably and making it even easier to keep your home beautifully fragranced.
How to Refill Your Reed Diffuser
Refilling your reed diffuser is quick and straightforward. Here's how:
- Empty and clean your diffuser bottle — rinse with warm water and leave to dry completely before refilling
- Use the funnel — our 100ml refills come with a small funnel for easy pouring; the 500ml refill works with your existing funnel
- Pour in your refill oil — fill to the same level as your original diffuser
- Add fresh reeds — replace your old reeds with the new set included with your 100ml refill, or use reeds from a previous refill
- Position and enjoy — place in your chosen spot and allow the reeds to draw up the fragrance
We recommend replacing your reeds each time you refill, as old reeds can become clogged with dust and oil residue over time, reducing fragrance performance.
World Earth Day and Why It Matters to Us
World Earth Day is celebrated every year on 22nd April. First observed in the United States in 1970, it has grown into a truly global event now recognised in more than 190 countries worldwide. It's a day dedicated to raising awareness about environmental issues and inspiring people, businesses, and governments to take meaningful action to protect our planet.
For us at Marsden & Whittle, World Earth Day is a moment to reflect on what we're doing — and recommit to doing more. But our commitment to the environment isn't something we think about just once a year. It's built into how we run our business every day.
How Marsden & Whittle Does Its Bit for the Planet
We're a small, independent business, and we know we're not perfect. But doing our bit for the planet is genuinely important to us, and we focus our efforts in three main areas.
Products
Our products are designed with minimal packaging from the outset. We offer refills for our reed diffusers precisely because we believe in reducing glass consumption and giving our products a longer life. All of our fragrance oils are paraben free, and our refill bottles are made from clear PET fully-recyclable plastic.
Packaging
We use biodegradable and recyclable packing materials throughout our fulfilment process — from the boxes we ship in to the materials we use to protect your order in transit.
Transport
We drive an electric vehicle for our deliveries and for getting to and from events. It's a simple change that makes a meaningful difference, and one we're proud to have made.
We continually review our products and processes and make improvements wherever we can. We're always learning, and we believe that small, consistent steps add up to real change over time.
Why Choosing Refills Is Good for the Planet
Every time you choose a reed diffuser refill over a brand new diffuser, you're making a genuinely positive environmental choice. Here's why:
Less glass — a new reed diffuser comes in a glass bottle that requires energy to produce and transport. By refilling the bottle you already have, you're reducing demand for new glass.
Less packaging — refills use significantly less packaging than a full diffuser product, meaning less waste ends up in landfill.
Lower carbon footprint — less manufacturing, less packaging, and less transport all add up to a lower carbon footprint per fragrance experience.
Better value — sustainability and value go hand in hand with refills. At just 12p per day with our 500ml refill, you're getting a luxury fragrance experience at a fraction of the cost of repeatedly buying new diffusers.
Our Scents — Available in Every Refill Size
All of our reed diffuser refills are available in the full range of 18 Marsden & Whittle signature scents. Whether you love the fresh citrus warmth of Lemongrass & Ginger, the deep and exotic richness of Myrrh & Tonka, or something in between, you'll find your perfect refill in both our 100ml and 500ml sizes.
Not sure which scent is right for you? Browse our full fragrance collection to find your favourite.
Frequently Asked Questions About Reed Diffuser Refills
Can I use a Marsden & Whittle refill in a different brand's diffuser? Yes — our refill oils work in any standard reed diffuser bottle. As long as the bottle is clean and dry, you can use our refills to top up any diffuser you own.
How long does a reed diffuser refill last? Our 100ml refill typically lasts around 12 weeks. The 500ml refill contains enough oil to fill a single 100ml diffuser bottle five times, giving you up to 60 weeks of fragrance from one bottle.
Do I need to buy new reeds every time? We recommend replacing your reeds with each refill for the best fragrance performance. Our 100ml refills include a replacement set of four fibre reeds. If you're using the 500ml refill, we recommend keeping a stock of spare reeds or using the reeds from your most recent 100ml refill.
Are the refill bottles recyclable? Yes — all of our refill bottles are made from clear PET plastic, which is widely recyclable.
Are Marsden & Whittle fragrance oils paraben free? Yes — all of our oils are paraben free.
Shop our full range of reed diffuser refills below, and save £5 when you Mix & Match any two qualifying products.
