IO Genix Water Bottle - 1.9L Sport BottleL Matte Black

What is the IO Genix 1.9 L water bottle?

The IO Genix water bottle is a 1.9-litre sports bottle in matt black food-grade plastic, fitted with a handle and a metal screw cap. It belongs to our accessories section and is not a foodstuff: there are therefore no nutritional values or ingredients to declare.

The size is what defines it. At 1.9 litres, it does not slip into a bag pocket: this is a bottle you set down beside the bench and fill once for the whole session, or even for half the day. It is the format that has replaced repeated trips to the water fountain, and it is also the simplest way to know how much you have actually drunk.

The wide opening is the second technical point. It lets you add a powder by hand without a funnel and, above all, pass a brush inside to clean the bottom — something no narrow-necked bottle really allows. The rest of the brand's accessories can be found in our IO Genix section.

How do the technical specifications measure up?

Two points deserve comment, because they make the difference in day-to-day use.

The metal screw cap is the choice that sets this bottle apart from flip-top models. A flip-top always ends up leaking: the spring loosens, the seal warps, and the bottle empties into your gym bag. A screw cap with a gasket holds up over time, at the cost of one extra movement every time you drink. On a bottle of almost two litres carried full, that is the right trade-off.

The BPA- and DEHP-free claim refers to two compounds whose use in food-contact materials is regulated in Europe. The manufacturer also states compliance with EC Regulation 1935/2004, the reference text on materials intended to come into contact with foodstuffs. This is regulatory compliance, not a quality label: it is expected of any product sold legally, and it is good that it is stated.

A word about the hydration figures you come across everywhere on this type of page. The former description on this page claimed that you should drink “1 litre per hour of exercise” and that “performance declines from 1% dehydration onwards”. We have removed those statements, which are not universal rules: requirements vary enormously with temperature, intensity and the individual. The benchmark we can honestly quote is the EFSA one: around 2 litres of water a day for a woman and 2.5 litres for a man, from all sources combined, to be increased in hot weather or with physical activity. A 1.9-litre bottle therefore covers most of that baseline on its own.

How should you use and look after the bottle?

Before first use: wash in warm soapy water and rinse thoroughly. Filling: through the wide opening, with cold or room-temperature water. Closing: screw the cap on firmly before carrying it anywhere. After each use: rinse, wash in warm soapy water, and leave to air-dry, open.

Drying it open is the only real maintenance rule. A bottle closed while still damp develops a smell within three days, and once it has set in it is irreversible. Stand it upside down with the cap off to one side and the problem never arises.

Never pour boiling liquid into it: the plastic warps and the bottle loses its seal. Cold or room-temperature water only. Nor should you use it for anything other than drinks, which seems obvious but is set out explicitly in the manufacturer's instructions.

If you mix protein in it, rinse it immediately after drinking rather than once you are home: milk and whey dried at the bottom of a warm bottle are far harder to shift, and that is where the wide opening really comes into its own.

Finally, avoid leaving it in the sun in a car. Prolonged heat tires the plastic and the cap gasket, and lukewarm water has never made anyone want to drink.

Who is this bottle for, and who is it not for?

It suits anyone who trains for a long time, who wants to keep track of what they drink over a session or a day, and who has had enough of interrupting their work to go and refill a 700 ml shaker. It suits particularly well those who dilute their BCAAs or their electrolytes for the whole session: two litres is the volume that lets you sip from start to finish.

It also works as a desk bottle, which is a more frequent use than people think: filled in the morning, it makes visible what has been drunk by 16:00.

It is not for you if you are looking for a container to carry on a bike or slip into a compact rucksack: 1.9 litres weighs almost two kilos once full, and the format is bulky. For that use, a classic 600 to 700 ml shaker remains far better suited.

Nor is it for you if you want to put hot drinks in it: this is not an insulated flask, and the plastic is not designed for that.

What not to expect from it: a bottle does not magically make you drink more. What it really changes is visibility — seeing that a litre is left at 15:00 is a far more effective reminder than good intentions. That is also why large formats work better than small ones for people who forget to drink.

Large bottle or classic shaker?

The two complement each other more than they replace each other, and many of our customers have both.

A 600 to 700 ml shaker, with its mesh or ball, is made for mixing a thick powder and drinking it straight away. It is the tool for whey after the session and for creatine in the morning: small, portable, quick to wash. Its weakness is volume: it forces three refills over a long session, and nobody really does that.

The 1.9-litre bottle does not mix as well — no mesh, and the volume is too large to shake a thick powder effectively. It does, on the other hand, settle the question of hydration over a session or a day once and for all, and it suits powders that dissolve on their own very well: electrolytes, amino acids, flavourings.

The most effective combination is therefore both together: the shaker for protein, the bottle for everything else. The full range can be browsed in our sports nutrition section.

Frequently asked questions

What is the exact capacity?

1.9 litres. It is a format designed to cover a whole session, or even half a working day, without having to refill it. Full, it weighs almost two kilos: that is worth bearing in mind if you have to carry it for a long time.

Can you put hot drinks in it?

No. The plastic is not designed for that and warps on contact with a boiling liquid, which compromises the seal of the cap. Cold or room-temperature water only, and it is not an insulated flask.

Is the cap really leak-proof?

It is a metal screw cap with a gasket, which holds up far better over time than a flip-top system. You simply need to screw it on firmly before laying the bottle down in a bag. A dry or damaged gasket always ends up leaking: check it from time to time.

How do you clean it properly?

In warm soapy water after each use, then air-dry it open and standing upside down. The wide opening lets you get a brush right to the bottom, which is essential if you regularly mix protein in it. A bottle closed while damp takes on a smell within a few days.

Can you mix a protein shake in it?

Yes, the wide opening makes it easy to add the powder. The result will be less smooth than with a mesh shaker, however: the volume is too large to shake effectively. It does suit powders that dissolve on their own very well, though, such as electrolytes or amino acids.

Is it dishwasher-safe?

The manufacturer does not say so in the information available to us, and we will not claim it. The heat of an intensive cycle tires plastics and matt coatings. Washing by hand in warm water remains the safe option, and it takes a minute.

What material is the bottle made from?

From a food-grade plastic declared free from BPA and DEHP, with a stainless metal cap and a reinforced plastic handle. The manufacturer states compliance with EC Regulation 1935/2004 on materials in contact with foodstuffs. It does not specify the exact type of polymer.

Where can you buy the IO Genix bottle?

It can be ordered from this page, and we ship throughout France and Europe. At our Vendargues shop, about ten minutes from Montpellier, it is the accessory we sell most between May and September: in a gym where it is twenty-eight degrees, the large bottle is no longer a gadget, and it is often the best buy of the season for a minimal outlay.