With the new bottle cleaner and patented dual-action, your bottle gets twice as clean – and faster than ever before.

Cleaning your water bottle: 3 easy Tips for everyday use
Before we get to the Cleanions, three simple habits that already significantly improve your everyday bottle Cleaning routine:
- Rinse after each use and leave to dry open. A damp, sealed bottle is the perfect breeding ground for bacteria, especially overnight.
- Clean the cap and straw separately.That's where most biofilm accumulates – in threads, seals, and narrow tubes; a small brush helps where water alone can't reach.
- Clean dishwasher-safe bottles regularly at high temperature.This dissolves limescale and residues more reliably than hand-washing.
These three steps to clean your water bottle help in daily life, but they don't replace a proper deep clean – more on that next.
As well-intentioned as these three habits are, they rarely reach the real problem areas of a water bottle. The reason lies in the bottle's shape itself.
More bacteria than a toilet? How dirty your water bottle is

Studies show: Millions of microorganisms accumulate in reusable water bottles – sometimes many times more than what you find on a toilet seat.
How often do you clean your water bottle, and how thoroughly? If you just rinse it briefly or simply put it in the dishwasher, you're in good company – most people do exactly that. Unfortunately, it rarely gets truly clean this way, even if it looks clean.
It's hardly possible to get a bottle completely clean with conventional methods, and if you do, it takes a lot of effort.
One reason for this is the bottle's design. The narrow neck, the threading on the cap, and for sports bottles, the attached straw provide bacteria with plenty of surface area to cling to. Saliva, leftover fruit juice residue, or protein powder also leave behind nutrients that germs feed on. If moisture is added to the mix — for example if the bottle is left closed overnight — a so-called biofilm forms within just a few hours: a thin, sticky layer of bacteria that can barely be removed with regular Dishwashing.
That's exactly why a bottle can look shiny and clean on the outside, yet still full of germs inside. The eye is unfortunately quite reliable at fooling us here.
By the way, the same principle applies not just to water bottles. Bacteria also love to settle in damp, dark corners of washing machines and cause unpleasant odors. You can learn how to fix that in our article Clothes smell bad after Laundry.
That's why we developed Cleanions. Our little helpers clean your water bottle in an entirely new way: deep-penetrating, fast, and no scrubbing required.
How do Cleanions work?
The Cleanions clean your water bottle effectively and sustainably, thanks to their unique dual action of mechanical friction and natural active ingredients.
When shaken, the small beads dislodge dirt and buildup through their movement, while the eco-friendly Ingredients neutralize odors and ensure hygienic cleanliness.

This is how you clean your water bottle in just one minute – no scrubbing, chemicals, or microplastics required.
Your water bottle, twice as clean – in 1 minute.
CHF 12.90
Your bottle stays hygienically clean and fresh – no scrubbing and no unnecessary chemicals.
- ⚡ Uniquely powerful thanks to the combined effect of mechanical friction and eco-friendly cleaning agents
- ⏳ Lightning-fast clean – effective in just 1 minute
- 🌿 Easily biodegradable
- 🚫 No plastic & no unnecessary additives
- 💚 Natural Ingredients
How to use – it's that simple
Our Cleanions leave your bottle hygienically clean — here's how it works:
- Add 8–10 Cleanions to the bottle
- Add some warm water (fill to about 1 cm high)
- Seal the bottle and shake vigorously for about 40 seconds
Attention: Cleaning the bottle can build up pressure easily – open carefully - Rinse thoroughly – done!

For non-sealable hollow bodies or limescale and heavy soiling:
Fill the container all the way to the top with hot water and add 8–10 Cleanions. For optimal results, let the Cleanions soak in the water for roughly 1 hour.
For severe limescale buildup, it's also worth checking our bluu Calcbusters, our descaler for heavy-duty Cleaning of machines and containers. Also ideal for thoroughly cleaning bottles!
Common home remedies for cleaning water bottles: What actually works
Before Cleanions were available, many people made do with traditional home remedies. A short, honest look at how well those actually perform:
- Vinegar water: it dissolves limescale fairly reliably, but it barely helps against biofilm and dried residues in threads, and often leaves a strong smell.
- Baking soda: it has mild antibacterial properties, but its effect alone is usually not enough for a thorough deep clean.
- Denture cleaning tablets: they clean chemically quite well, but often leave an artificial taste in the bottle and are not suitable for all materials.
- Shaking rice porridge or sand plus water: mechanically effective, but cumbersome and unhygienic in How to use.
The Cleanions combine exactly the two modes of action that are used separately in individual home remedies: the mechanical friction of the beads and the chemical effect of natural Ingredients. This explains why they clean water bottles more thoroughly and quickly in practice than any single home remedy used on its own.
Get 10% off your first order
Sign up for the bluu newsletter and get 10% off your first order, plus regular Tips covering sustainable Cleaning and Laundry delivered straight to your inbox.
What are Cleanions suitable for?
The Cleanions from bluu are the simple solution for getting bottles and other hollow containers hygienically clean. No scrubbing or harsh chemicals required at all.
Whether it's a water bottle, carafe, vase, thermos flask, or baby bottle: Cleanions reliably clean even areas where brushes or dishwashers reach their limits.
Its natural active ingredients dissolve deposits, biofilm, and odors deeply – if needed, simply let it soak longer (1 hour or more). This makes everything hygienically clean again, without residues, plastic, or fragrances.
Sustainable, biodegradable, and effective – for everyone who wants to combine cleanliness and environmental awareness.

The must-have for everyone who wants to clean their water bottles quickly
The Cleanions with a unique dual-action effect: mechanical friction breaks down and dissolves buildup, while the active Ingredients deliver targeted chemical cleaning and neutralize odors.
In just 1 minute, you turn a used bottle into a hygienic, odor-free, and fresh experience – no scrubbing or unnecessary chemicals needed.
Sources: waterfilterguru.com/swabbing-water-bottles
Explore more sustainable Tips & cleaning solutions
More questions? Common questions about cleaning water bottles
01 How often should I clean my water bottle?
To clean your bottle, rinse it best daily and give it a thorough clean at least once a week; clean it more often if you use it intensively, such as for sports.
02 Is the dishwasher enough to properly clean bottles?
Dishwashers work well for sturdy, dishwasher-safe bottles, but they often cannot reach narrow closures and drinking straws. That's where Cleanions deliver more reliable results.
03 How do I clean bottles with a narrow neck or straw?
Cleanions are especially well suited for hard-to-reach spots when cleaning water bottles — the small beads easily reach places where a brush cannot fit.
04 Are Cleanions suitable for all bottle types?
Yes, Cleanions are suitable for water bottles, carafes, vases, thermos flasks, and baby bottles made of glass, stainless steel, or durable plastic.
05 What should I do if my bottle is heavily limescaled
For cleaning bottles with heavy limescale buildup, let the Cleanions soak for longer – around one hour – and for stubborn buildup on machines and containers, a special descaling agent such as the bluu Calcbusters is also well suited.