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Air Up drinking bottle put to the test: A clever incentive for water muffles

This is how Air Up works: Taste with your nose

The Air-Up drinking bottle mixes water with flavored air. This works thanks to interchangeable fragrance attachments, called pods. When drinking, the smell is perceived in the brain as a taste. Air Up uses the retronasal smelling process for this: We humans always perceive aromas retronasally when eating and drinking, i.e. via the mouth in the nose and throat area.

Price: A plastic air-up bottle costs around 35 to 40 euros together with two or three pods. The pods then have to be bought again and again. The three-pack is available for 6 to 9 euros.

In the test: We selected pods in three flavors for the test: Raspberry-Lemon (raspberry-lemon), Orange-Vanilla Swirl (orange-vanilla) and Peach (peach). They were tasted by three sensory trained examiners and examined in the laboratory for their aromatic substances. On top of that, we tested the air-up bottles in different colors for critical substances.

In the quick check. We tried and analyzed three flavors. In addition to the color anthracite, the air-up bottle also came to the test laboratory in the colors blue and white. © Stiftung Warentest / Ralph Kaiser

How to use the Air-Up bottle

With fragrance attachment.
Air Up consists of a drinking bottle with a straw and a mouthpiece on which a so-called pod is placed. This ring-shaped aroma attachment is available in different flavors. Pull the pod up to activate it.
Different way of drinking.
When sucking, air is also drawn into the mouth through the pod. Unlike usual, the bottle is not tilted while drinking. If the pod is activated, the bottle leaks a bit when tilted due to the built-in pressure equalization valve.
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Convincing in the taste test

Air Up implements the principle of retronasal smelling well. Our reviewers describe the flavors as easily recognizable. They found the vanilla note to be very intense.

Air Up works with both still and sparkling water. But carbonated water supports the fragrance effect, the water tastes slightly sour and thus brings out the aromas better than still water.

Tip: Take tap water. This is environmentally friendly and of good quality in this country, as our 2019 drinking water test showed. With one of the good sparkling water makers in the test, you can make the still water from the tap individually sparkling. Those who prefer to buy their water in the shop will find their favorites in our mineral water test, both sparkling and still.

The aromas usually do not come from fruit

And how do the pods get their scent? According to the supplier, “natural aroma” is used. This is true for the Raspberry Lemon and Peach pods: we found no evidence of non-natural flavorings in the laboratory.

But nothing here comes from raspberries or peach. “Natural aroma” just means that it must occur in nature, among other things. The pods contain a fantasy aroma of individual natural flavorings, which tastes similar to these fruits. The depiction of raspberry and peach on the pods and the packaging therefore promises too much. Only the citrus aroma is authentic, i.e. from the fruit.

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Orange-vanilla pod with a striking aroma mix

Even the pod orange-vanilla should only contain “natural aroma”. In our analysis, however, we detected piperonal. In our opinion, this sweetish, vanilla-like flavoring is non-natural. We are not aware of any industrial process by which piperonal can be obtained naturally within the meaning of the EU Flavor Regulation.

It also contains a large amount of vanillin. In addition to this vanilla-flavoured fantasy aroma, the pod contains citrus aroma.

Tip: Would you like to know more about flavorings? How are they made? Are they harmful? What does the food industry use flavors for? Our Aroma FAQ provides answers to the most important questions.

Pollutants are not an issue

In the pollutant check, Air Up works: We did not find any conspicuous or even critical substances such as bisphenol A or benzene in the material. We tested three bottles in the colors blue, white and anthracite with a mouthpiece and straw in a broad screening for substances that could migrate from the bottle into the water.

The bottle is made of Tritan, a plastic that is also used for baby bottles. Like all plastic bottles, Air Up should not be exposed to the sun or heat for long periods of time, otherwise this will affect the taste of the water it contains.

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Which promises the Stiftung Warentest has checked

The no-bullshit statement. “No sugar, no bullshit” is what Air Up says on its homepage. No sugar or additives were used. That is not completly correct. We could not detect any sugar in the pods, but carriers and solubilizers for the aromas. That is not critical. From a purely legal point of view, however, carriers are additives.

The five liter goal. A pod should provide taste for at least five liters of water, i.e. for eight bottles (650 ml each). In the first two bottles, the taste impression is quite clear, then gradually decreases, but lasts through the promised five liters. Important: During breaks from drinking, press down on the pod to turn it off.

The 99.99 percent promise. “You are actually drinking 99.99% pure water,” Air Up explains on its website. We checked this with a specially designed extraction unit. The drinking simulation shows that aromatic substances are transferred into the water – but not more than 0.01 percent. The promise is true. But: Bought flavored water that only contains aroma and no sweeteners can also maintain this purity.

Test conclusion: An option for those who don’t like water

We mean: Water is the best thirst quencher. It contains neither sugar nor sweeteners. For people who drink little or no water, Air Up may be worth trying. However, one should not expect too much from the fruit illustrations on the packaging. The pods contain a fantasy aroma, but the taste impression fits the stated strain.

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Costs and environment: The scent for the water in the plastic bottle is not exactly cheap. Depending on the flavor, three refill pods cost between 6 and 9 euros – around 40 to 60 cents per liter of drink. The pods and their packaging create waste.

Alternatives: Infused water – water infused with fruit or herbs – is easy to make yourself. It takes some time as the flavors have to unfold first. Our recipe for refined water offers three ideas. In our special Drinking right, we give more tips on drinking water and other recommended drinks.

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