Why Your Bottle Smells Bad (and How to Avoid It)

If you've ever opened your reusable bottle and noticed a bad smell, you're not alone. It's one of the most common questions and, luckily, it's easy to fix.

The good news: it doesn't mean your bottle is in bad condition.
In most cases, the problem comes down to how it's used and cleaned.

 

Why does a bottle start to smell?

The smell doesn't come from the material (as long as it's high quality, like LAKEN's), but from residue left inside the bottle or in the cap.

The most common causes are:

• Drink residue (juice, coffee, sports drinks…)
• Moisture trapped when the bottle is stored closed
• Not letting it dry completely
• Dirt built up in the cap

The cap is key: it's where residue and odors build up most easily.

 

Is it normal for it to smell?

Yes, it can happen with any reusable bottle if it isn't cleaned properly.

Even 18/8 stainless steel, which doesn't retain odors, can start to smell if there's residue inside or in the cap seals.

 

How to get rid of bad odors (quick and effective)

In most cases, a good clean is enough:

1. Wash the bottle with hot water and mild detergent
2. Add a mixture of hot water and a little vinegar
3. Shake well and leave it for a few minutes
4. Use a soft brush if needed
5. Rinse well and let it dry completely with the cap off

For more persistent odors:

• Repeat the wash with hot water and vinegar and leave it for longer
• Clean the cap and its seal thoroughly, as that's where residue usually builds up
• Rinse well and let the bottle dry completely open before using it again

 

Key tip: clean the cap (and its seal) too

For a truly thorough clean, don't forget the cap.

Every now and then, you can take it apart and remove the silicone seal:

• Wash it with hot water and soap
• Rinse it well
• Put it back correctly

It's a small part, so handle it carefully.

On some models the seal isn't removable, but it's still worth cleaning the whole area well.

 

The most common (and most important) mistake

Storing the bottle closed and damp.

This is the main reason odors appear.

Always let the bottle dry completely and store it with the cap off.

 

How to stop it happening again

It's simple:

• Clean the bottle after every use (especially if it's not just water)
• Wash the cap often (preferably by hand)
• Don't leave drinks inside for days
• Always let it dry open

If you only use your bottle for water, it needs very little maintenance.

But if you use it for coffee, juice or smoothies, pay extra attention to cleaning, especially the cap.

 

When should you replace the cap?

If the smell persists after several cleans, the cap is probably the source.

In that case, replacing it is the best way to make your bottle feel like new again.

At LAKEN we offer spare parts to extend the life of your bottle without having to replace it entirely.