Skip to product information
Duet

Duet

£45.00
Taxes included.

33 reviews

Coffee cup

  • 340ml (12oz), insulated

Cup lid

  • Spill-Proof Lid
  • Removable Slider (for deep cleans)
  • Nested in Cup Base (tucked away from surfaces)

Water bottle

  • 600ml
  • Leak-Proof Lid
  • Recycled Stainless Steel

Dimensions

  • Overall Height: 315mm
  • Diameter: 74mm (fits standard cup holder)
ColorSoft Grey
CARE & MAINTENANCE

To maintain the beauty and integrity of your purchase, we recommend treating it with care. Simple maintenance practices, such as gentle washing and proper storage, can effectively preserve the longevity of your favorites. We encourage you to refer to the care instructions included with each item, designed to help you keep your purchase in top condition.

SHIPPING & RETURNS

We aim to process and ship all orders promptly. If something isn't right, you can return unused items in their original packaging within 14 days of delivery for a full refund (excluding shipping costs). Faulty or damaged items are replaced or refunded free of charge, just contact us within 14 days with photos of the issue.

Read our full Refund Policy for full details.

What Duet solves

Many people carry a reusable water bottle but still use a disposable coffee cups because carrying a separate reusable cup is inconvenient and easy to forget. Duet removes that friction by keeping a reusable coffee cup with the bottle people already use.

What Duet is

Duet is a reusable water bottle and coffee cup designed to stack together for compact storage and easy transport. When you take your bottle, your coffee cup comes with it. The two parts can be used separately or together, depending on the drink you choose.

Tackling the Real Problem

Tackling the Real Problem

Not just another reusable. Duet isn’t solving the disposable cup problem; it’s solving the reusable cup problem; forgetting it, carrying it, and cleaning it.

Uncompromising Design

Uncompromising Design

Designed to look just as good together as apart. Standardised cup and bottle sizes, designed to look good together, and function as you need it when apart

Space-Saving

Space-Saving

40% smaller footprint than carrying two separate items. Fits in standard cup holders, unlike bulkier competitors or awkward bottle designs.

Sustainable Meets Practical

Sustainable Meets Practical

After up to 83 uses, Duet offsets the carbon cost of its production. Each refill avoids around 52 g CO₂e compared with a single-use cup, based on a cradle-to-gate life cycle assessment (LCA) following ISO 14040/14044 methodology, cross-checked against published third-party LCA data (KeepCup, 2018; Chilly's).

  • 5 stars: 33 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
A
Anonymous

I love my Duet coffee cup and water bottle. The way they connect saves so much space in my bag, and they’re both lightweight and easy to clean. The coral colour is gorgeous, and they keep drinks hot or cold for ages. I take them everywhere now!

A
Anonymous

My favourite desk buddies! Can’t start my day without them. 🩷

A
Annewebb

I always love a coffee on the go but not out of a bottle (several times pours down my face) and neither can I stand plastic lids from a take out coffee. Without doubt the Duet ticks both boxes and the cup fits perfect in my car drink holder. The lid is fantastic for emergency braking.
It’s a brilliant size as well and slips nicely into a handbag/coat pocket.

K
Kirsty

Fantastic product! So easy to have water with you and a coffee cup that takes up so much less space because they fit together. Every coffee shop I go to it’s a talking point. The magnetic lid always gets people’s attention. I take the Duet everywhere!

G
Grace

Brilliantly designed, eco- friendly bottle is the ultimate travel companion, combining a water bottle and coffee cup into one convenient unit. It features a secure, integrated cup, fits perfectly into the car cup holders, and is effortlessly easy to clean. I absolutely love it.

B
Bassel

The duet is great! It’s perfect for compactness and getting rid of the “do I take my water bottle or my hot drink cup” dilemma! Very aesthetic design with really nice fine touches from the magnets embedded to the aesthetic features of it, absolutely love it! Great environmental impact as well!
I got the white/orange one and I really like it!

M
Melanie

The idea product for going to work and travelling! Able to take it on my bike and have my both my reusable coffee cup and water bottle with me without having to rely upon a plastic cup!

G
Gillian Murray

I absolutely love my Duet. It's been on various business trips with me and fits neatly packaged together in my laptop backpack pocket. I particularly like that the edges of the bottle and the mug are both nicely 'rounded' and don't feel uncomfortable to drink from. I have the coral coloured set and the colour is gorgeous in real life. My only regret about my purchase is that I didn't get it personalised (!) and given the great quality of the Duet, I suspect I'll be waiting a long time for them to wear out so I can buy another and have it personalised. Perhaps I'll just treat myself to a second set in another colour first!

D
Doris

I love my duet! Literally perfect for busy life, heading in and out of the office etc. So good for a wholesome walk at the weekends too!

A
Anonymous

I absolutely love my Duet!! Couldn’t recommend enough 🤩 It’s the perfect size to fit in a small bag, is super easy to clean and love the simple mechanism to store both parts away.

D
Diane

Love this water bottle, I really like the coral colour, the slim shape and the innovative coffee cup attached. I take it everywhere and get a lot of questions about it. Can't imagine another product usurping it ever.

S
Sam

I get complimented on my bottle all the time - so handy! Only drawback is I have no idea what I'm going to do with all the new found space in my backpack

A
Anonymous

Such a fab design. Love it.

J
Janetw

This product is amazing! It is convenient to have both your coffee cup and water bottle with you together. They take up less room to carry around because they integrate into one another. The coffee cup keeps hot drinks very hot. Love love love the product.

A
Anonymous

Excellent product, love the concept and works very well in my working and personal environment. Robust and easy to transport around. Already bought one for a present

A
AngusCordery

Received as a gift and I absolutely love them. Packs neatly into the side pocket of my bag & I'm ready for water and coffee all day long. I love how the lid packs into the base... Genius!

They're pretty strong as well, I'm clumsy and have dropped it onto hard concrete / stones a couple times. Still works great!

Would recommend to anyone who uses a water bottle & likes coffee in the thermal cup :)

L
Louisa

So fun and innovative

A
Anonymous

A fantastic product! It looks great and have found it ideal for days in the office where I’d normally take 2 separate bottles.

J
Jayne

I absolutely love this product! The dual-functionality of having a bottle and a cup in one sleek design is brilliant. It’s super durable, completely leak-proof, and means I’m carrying around less stuff. It has made staying hydrated on the go so much easier. I take it everywhere with me now. Highly recommend!

S
S Whiteside

The Duet is an outstanding product that combines innovation, practicality, and an excellent high quality design. I would highly recommend it to anyone looking for a smart, dependable solution that genuinely makes life easier.

A
Andrew Wilson

Bought a duet on the first presale and used it every day since. Having both the water bottle and coffee cup combined has been great for me going into the office. Also the design is really cool and so many people have asked me about it.

N
Nicole

Brilliant flask and coffee cup! Always get compliments on the style too. Nice and compact for carrying to and from work!

R
RH

I’m obsessed with this bottle. I work as a teacher at a secondary school, and the kids are always nicking my bottle to play with the mechanism. They love showing new people how it works and sticking it to various metal objects around the school, so that’s one reason. The next reason is that I’m never without a cup to make myself a hot tea. At work, I never have time to drink tea quickly, and this bottle is brilliant at keeping it hot. And finally, I don’t drink enough water. I’d happily drink just tea and coffee if I could, but this design encourages me to do both because if it’s there, I might as well drink it. Big fan of the Duet. Highly recommend.

S
Sue

I love this product! The sleek but stylish way that the bottle fits securely into the empty cup for transport is great, it means that I can have both options to hand when out and about. The slim style means that its easy to pop into a backpack or shoulder bag, it also sits neatly into my car's cup holder. It'll be great to take away on holiday.
I'm really happy with my Duet and I have also gifted one to a family member who's found it really useful to take to work with her.

S
Sandytbute

I was gifted the Duet at Christmas and use it every day.
A hot drink comes with me on my morning dog walk, then it’s straight to the gym with my cold water bottle.
They fit neatly together, making it so convenient to take both wherever I go.

H
Helen

Love my duet cup/water bottle combo! So practical only having to carry one item. I love the colour (coral) and style - I’ve had so many compliments and people asking where I got it.

M
Mel

I’ve been really impressed with the Duet, not only is it sleek and modern but it’s extremely practical, keeping hot drinks hot and cold drinks cold, made from stainless steel it’s super easy to keep clean, the magnetic base means it’s not knocked over easy, overall I would highly recommend it for anyone using a cup or water bottle. 10/10

S
Scott Alexander

Being a truck driver and having this two in one cup combo helps me through my working day. From Early morning coffee to water in the afternoon keep both warm and cold respectively and being two in one it allows me to store easily in my bag without any bulk