WATER BOTTLE. COFFEE CUP. MAGNETICALLY CONNECTED
Two reusables. Carry as one.
Duet is a water bottle and coffee cup designed to magnetically stack together. Easy to remember. Less to carry.
5.0 from 33 reviewsFree shipping · Sunny Coral or Soft Grey · Designed in Glasgow
Not just another reusable.
Most people want to reuse. The problem is the reusable cup itself: easy to forget, annoying to carry. Duet fixes both.
Easy to forget
Now your cup comes too
You already pick up your bottle on the way out the door. The cup clicks on, so you remember both.
Annoying to carry
Takes up 40% less space
Stacked, Duet takes a 40% smaller footprint than a separate cup and bottle, and fits standard car cup holders.
THOUGHTFUL DESIGN
Great together and apart
A matching bottle and coffee cup, each designed to look as good together as they do when apart.
How it works
Grab your bottle
A 600ml recycled stainless steel bottle with a leak-proof lid.
Click the cup on
The 340ml insulated stainless steel cup stacks onto the bottle. One thing to carry.
Use them together or apart
Water all day, coffee when you want it. They look just as good either way.
Duet in real life
Wherever your day takes you
What you get
- Magnetically connectedCup and bottle click together for easy carrying, and separate to use individually.
- 340ml (12oz) coffee cupInsulated stainless steel with a splash-resistant lid. Keep upright when filled.
- 600ml water bottleSingle-wall bottle with a leak-proof lid. When stacked, the bottle benefits from the cup's insulation.
- 315mm tall, 74mm acrossFits standard cup holders
- MaterialsMade from recycled stainless steel, and polypropylene, and silicone seal. BPA free
- Make it yoursOptional engraving up to 30 characters, £5
Laser engraving · £5
Personalise your Duet
Add a name, a date or a few words to your coffee cup. Laser engraving turns Duet into a great gift.
- Up to 30 characters
- Engraved on the coffee cup only
- We'll engrave your text exactly as entered, so please check spelling and capitals
- Personalise when you order
Real people, real routines
5.0 from 33 reviews
Questions
Frequently asked questions
What is Duet?
Duet is a water bottle and coffee cup designed to magnetically stack together, so when you take your bottle, your reusable cup comes too. It's designed by Nudge Innovations in Glasgow.
How big is Duet?
The coffee cup holds 340ml (12oz) and the water bottle holds 600ml. Stacked, Duet is 315mm tall and 74mm across, and takes up a 40% smaller footprint than carrying a separate cup and bottle.
Does Duet fit in a car cup holder?
Yes. At 74mm across, Duet fits standard car cup holders, stacked or apart.
Is Duet leak-proof?
The water bottle has a leak-proof lid. The coffee cup has a splash-resistant lid, so keep the cup upright when it's filled.
Is the coffee cup insulated?
Yes, the 340ml coffee cup is insulated stainless steel. When the two are stacked, the bottle benefits from the cup's insulation too.
How long does the cup keep drinks hot?
The insulated coffee cup keeps drinks hot for up to 4.5 hours.
Can I use the cup and bottle separately?
Yes. The cup and bottle click together for easy carrying and separate when you want to use them on their own.
What is Duet made from?
Duet is made from recycled stainless steel, and polypropylene, and a silicone seal. Its BPA free with no unnecessary parts.
How do I clean the lid?
The cup lid nests in the cup's base, tucked away from surfaces. The slider in the lid pops off for a deep clean. Just slide a spoon under the slider and it should pop out.
Is Duet dishwasher safe?
Yes, Duet works fine in the dishwasher, but the heat may make its coloured finish fade or wear faster. We recommend handwashing to keep it looking its best.
Can I personalise Duet?
Yes. Add laser engraving to the coffee cup for £5, up to 30 characters. We'll engrave your text exactly as entered, so please check spelling and capitals. Engraving is on the coffee cup only.
How much is Duet, and is shipping free?
Duet costs £45 with free UK shipping. It comes in Sunny Coral and Soft Grey.
Do you ship outside the UK?
For delivery across Europe, please email us at info@nudgeco.com before ordering so we can confirm shipping costs and delivery times. The prices and delivery charges shown on our website apply to UK orders. Any customs duties or local taxes are additional and not included.
Is Duet better for the environment?
After about 83 uses, Duet offsets the carbon cost of making it. After that, every refill avoids around 52g CO₂e compared with a single-use cup.
83 uses
That's all it takes to pay back its carbon
After about 83 uses, Duet offsets the carbon cost of making it. After that, every refill avoids around 52g CO₂e compared with a single-use cup.
Designed to make reuse easy
Nudge Innovations started in 2018 as a university project asking a simple question: if most people want to reuse, why do single-use cups still win? The answer was friction. So we design products that remove it.
Duet was designed by Daisy Tydeman, Product Design Engineer at Nudge.
