This can be due to a number of factors:

* Is the lid dry and clean and properly tightened before vacuuming? This is because it can happen that a lid is just not properly sealed and therefore air escapes. This can also cause the Nanostopper to pop back up. This can also happen if there is food in the jar that is producing gas or is still fermenting.

* Is the lid or the rim of the lid perhaps bent? Trying another lid of the same brand may help. Also, some lids have multiple vacuum rings. Then if the hole for the Nanostopper is not properly centered, vacuuming may fail. In addition, the lid should also have a silicone interior. 

* Have the contents of the jar or bottle come into contact with the Nanostopper or the lid? Then the valve can no longer close properly. Thoroughly cleaning and drying the Nanostopper can help. The Nanostoppers can also be cleaned in the dishwasher. 

Yes, basically all airtight jars are suitable for use with Nanostopper. Especially glass jars with a metal lid are very suitable, because they are made for vacuum, are durable and can handle the vacuum well.

These jars also come from production under vacuum, which you can hear by the characteristic "plop" at the first opening. If you do not hear this sound, then there is something is with the jar and most likely with the contents. With Nanostopper you can restore the vacuum by making a hole in the lid with the Lid Punch perforator.

Jars made of plastic or jars with a plastic lid are basically not suitable, this is due to the strength and rigidity of jar and lid. For example, a plastic jar can dent when vacuumed strongly and a plastic lid can tear when perforated and therefore cannot be vacuumed.

Also, a jar of peanut butter or chocolate spread does not seal airtight from the factory and because of this, it cannot be vacuumed.

The Nanostopper uses an ingenious system to hermetically seal, but also immediately serves as a vacuum indicator.

You can tell from the stopper whether the bottle or jar is under vacuum when the stopper lies completely flat on the bottle neck or jar lid. If the top part of the stopper "floats" above the lid or bottle neck, then the vacuum is broken. So you can always tell from a distance if there is still a vacuum!

If a jar is not tightened properly then you may not hear the signal from vacuum pump. This may be because the lid on the jar is not tightened properly. Then try again until you hear three or more clicks. This can also be repeated several times. 

With the vacuum pump and Nanostopper, you can create vacuum in bottles and jars by removing air. By doing so, you also remove oxygen, which is one of the main elements that cause loss of flavor and food spoilage. Less oxygen means less oxidation and therefore flavour and freshness will be preserved longer.

Note that there are more factors that contribute to food aging and spoilage, including temperature and the condition of the food before vacuuming. Maintain good hygiene and adhere to safe food handling guidelines. 

With the vacuum pump and Nanostopper, you can create vacuum in bottles and jars by removing air. By doing so, you also remove oxygen, which is one of the main elements that cause loss of flavor and food spoilage. Less oxygen means less oxidation and therefore flavor and freshness will be preserved longer.

Note that there are more factors that contribute to food aging and spoilage, including temperature and the condition of the food before vacuuming. Maintain good hygiene and adhere to safe food handling guidelines. 

For maximum functionality and creativity, we recommend using the Airtender Electric with the Airtender app. 

It is not needed to select air or vacuum mode, set power levels or start/stop the unit. However, the app can be used to create custom programs and to reset the unit in case the Aquasensor is triggered. Without the in-app Aquasensor wizard, the Airtender Electric cannot continue to operate in that case. This is a feature designed to ensure that the Airtender Electric is always operating at maximum performance.

If you want to download the app, check out the App page. 

The Nanostopper is dishwasher safe and can simply be run on a standard setting. In addition, the Nanostopper can also be boiled at 100 degrees for 5 minutes.

Sure! There are no different types of Nanostoppers, they are all interchangeable and usable for different applications.

Should you need more, they are also available separately as a set. 

We carefully do our best to deliver the order to you as soon as possible. Orders placed on weekdays before 15:00 will be shipped the same day. Usually it is delivered the next day. However, we do not always manage to meet this. Sometimes products are not in stock and then the delivery of the order may take a little longer.

Free shipping in the Netherlands from € 20,- & Belgium € 25,-.

And for orders where the free shipping option can be selected in the shopping cart.

We deliver within the Netherlands & Belgium all products with DHL parcel service.

We always look for the fastest and best method of shipping. Generally, delivery will take place the next working day between 9:00 and 18:00.

In addition, evening delivery can be selected for the next day. Unfortunately, we cannot always guarantee the time of delivery due to holidays.

Shipping costs outside the Netherlands & Belgium
- For orders abroad, shipping costs will be calculated at checkout based on weight and volume.

On the Airtender Electric we give a factory warranty of 2 years. The hand pumps have an extended warranty of 5 years. This means that, if a defect occurs due to a manufacturing fault, you will be sent a free replacement item, or your Airtender product will be repaired free of charge.

Everyone has the right to return the product within 14 days of purchase.*

We will of course refund the shipping costs paid to receive the package, we do charge the return costs. Excluding costs incurred with delivery actions.

Report your return via email retour@nanostopper.com

Prepare your product for the return trip:

- Pack it well and firmly. Preferably use the original packaging. This way, the chance of damage is minimized and we may be able to make someone else happy. Do you no longer have the original packaging? No problem, we will check the condition of your returned product and determine the depreciation;

- Ship in a sturdy box that you seal tightly.

- Delete data and account information as necessary.

- Print out your shipping label or write the response and return number on the box. You can find those in the email we sent you. 

- a DHL point near you;

- A mailbox if the package is small enough

- or give it to a DHL delivery person coming to deliver a package.

We strive to transfer the credit amount to you within 3 business days of return receipt. 

*Discounts, promotions and/or offers do not guarantee a full refund. If an amount has been transferred for the purpose of a promotion, that amount cannot be returned in its completeness.

Still not satisfied with the product? Or is the article defective? Please contact our customer service. Then we will see how we can best help you.

Of course! How nice to hear of your interest in becoming a reseller of Airtender products. An application can be made at sales@airtender.com. We will contact you as soon as possible with a free quote.