Clean, Click, Sing
Say goodbye to fiddly cleaning. The Flex opens wide so you can reach every bit of the inside, then clicks closed to use. Hygiene made simple.
Resono Flex
The bendy straw for water bubbling.
Rated 4.8 out of 5 from 27 reviews $13.00 USD- Food-grade silicone, and dishwasher safe
- Depth markings to find your setting again
- Opens wide to clean, clicks closed to sing
Not Available in Your Country Yet
We deliver to the UK and some other countries, but not the USA or the EU for now.
What's in the Box
One Resono Flex, in its own factory-sealed packet. The Flex itself arrives open: that’s normal (see How to Use).
How to Use
Put the end a few centimetres into a bottle of water and blow or sing through it. Deeper water means more resistance; the markings help you find your depth again. To close it, run one thumb over and one under the seam, clicking the halves together; it takes 20 to 30 seconds. Step-by-step guides are free in Rayvox Studio.
Materials and Care
Food-grade silicone, and dishwasher safe. It opens all the way so you can clean the whole inside.
Delivery and Returns
Delivery is calculated at checkout. We assemble every product to order, so please allow 7–10 days for dispatch; every parcel is tracked.
Changed your mind? An unopened Flex can be returned, as our Returns and Refunds policy explains. Each Flex comes in its own factory-sealed packet because it goes in your mouth, so once the packet is open it can’t be returned unless it’s faulty.
Resono Flex
$13.00 USD · ★ 4.8
The Bubble Lab
Free Your Voice With Bubbles
Water bubbling is a straw exercise with a twist: you blow, or sing, through a straw into water. The bubbles show you your airflow, so you can see when you’re pushing too hard or not enough.
StraightBendy
Clean, Then Click
It Opens Wide. It Clicks Closed.
The seam runs down the back. Open it right out to clean every bit of the inside, then click it back together.
- 1Open It UpIt arrives open, and that’s normal. Open it right out to clean the whole inside.
- 2One Thumb Over, One UnderPinch the seam at the back and click the two sides together.
- 3Click All the Way AlongWork down the seam until it’s sealed end to end. It takes 20 to 30 seconds.
OpenClosed
There’s a video of it in the Resono Flex guide in Rayvox Studio.
Why Resono Flex
Bubble Your Way to Vocal Freedom
Six small things that make a big, bubbly difference.
Bend the Rules
Soft and bendable, the Flex moulds to the way you practise, whether you’re just starting out or singing eight shows a week.
Pro Ready, Beginner Friendly
No experience needed. You’ll see your airflow in the bubbles, feel the pressure waves on your lips and hear the difference in your voice.
A Massage for Your Voice
The bubbles send gentle, alternating pressure waves back through your voice: the “massage” effect that makes water bubbling popular in voice therapy.
Seal the Deal With Every Note
The built-in 22 mm mouthpiece gives your lips a proper seal, so you stay in control of your airflow on every exercise.
Dive Deep
Depth markings let you note your favourite water depth and find it again next time. Deeper water means more resistance.
Seen Backstage
Pros Blow Bubbles Too
“I’ve been doing this before, during and after the show. I’ve never lost my voice.”
“The best warm up tool I’ve ever tried. It works instantly, removing any sort of strain from the throat.”
Reviews
What Customers Say
The Details
Want to Adjust the Resistance Too?
Resono Pro v2
Small, Blue and Bendy
- Length
- 300 mm
- Inside
- About 11 mm
- Outside
- About 20 mm
- Mouthpiece
- 22 mm, built in
- Material
- Food-grade silicone
- Cleaning
- Opens wide; dishwasher safe
- Design
- UK registered design 6266698
Bubbles at the right angle with its Multi-Purpose Angle, plus the VARA’s eight apertures and the Spinner.
See Resono Pro v2
FAQ
Questions About the Flex
Still Have Questions?
Our team answers every message.
Contact UsWhat are the Flex’s measurements?
300 mm long, about 11 mm across the inside and 20 mm outside (it isn’t perfectly round), with a 22 mm mouthpiece built in. It’s made from food-grade silicone and it’s dishwasher safe.
How does it arrive?
Each Flex comes in its own factory-sealed packet.
Why is my Flex open?
It ships open on purpose: the Flex opens all the way so you can clean the whole inside. To close it, run one thumb over and one under, clicking the halves together until it seals. It takes 20 to 30 seconds, and there’s a video in its guide in Rayvox Studio.
How deep should the water be?
Start with the end a few centimetres under the water. Deeper water means more resistance, so go deeper once that feels easy, and use the markings to find your depth again.
Is the Flex patented?
It’s a UK registered design, number 6266698.