Science says the real danger is in how we do it

A very typical gesture in our daily lives is to reuse the bottles we use to drink water or any other beverage. Something that is usually done to reduce the carbon footprint that can be caused by using a bottle only once and throwing it away. But at a time when microplastics are the order of the day, the truth is that it makes us think If reusing a bottle is harmful to us.

But we are not only talking about the plastic bottles that we buy in the supermarket with water or any other liquid such as a soft drink, but also the classic bottles that we are used to seeing in many places that They promise to keep you warm or cold inside..

Its plastic construction can set off alarm bells after seeing how microplastics have been found in the testiclesthe breast milk and other parts of the bodyit is logical to think that if we use the same bottle twenty or thirty times in the end we are consuming this type of substance.

The fear of microplastics. Little by little they get to know each other details about the effect that the consumption of microplastics has about our health, especially fertility. This means that we basically have to question the containers from which we consume food in order to ‘protect ourselves’ from its bad effects, as can occur in these bottles in container containers.

The problem. Popular belief states that reusing bottles could pose a significant risk due to the alleged accumulation of bisphenol A (BPA) and the proliferation of dangerous bacteria if they are not cleaned daily. However, current scientific evidence intensely qualifies these statements, distinguishing between real risk factors and unfounded precautions.

The release of bisphenols. Several studies have evaluated the migration of BPA and phthalates from reused bottles. under real use conditions. A recent experiment from 2021 simulating daily use in more than 20 types of bottles concluded that no migration of bisphenol A was detected in the stored water, even after several weeks of reasonable reuse. And the most interesting thing is that the classic aluminum bottles used as thermoses were also included.

Other scientific articles agree: the release of BPA depends fundamentally on the type of material, exposure to high temperatures and extreme wear, not on the mere fact of filling them with tap or refrigerator water. Bottles suitable for food use, well maintained and not subjected to excessive heatdo not dangerously increase exposure to BPA.

This logically changes radically if liquids are poured at high temperatures, which can cause more microplastics to be released. This is why you must always take into account the temperature of the liquids that are stored, so that it is the same as the original liquid that was stored.

But there are also different opinions. In this case, food technologist Luis Ribera, director of the Saia food safety consultancy, has warned of the risk of reusing bottles manufactured for single use, as reported by El Confidencial. ​Although he goes further by stating that the real danger lies in the microorganisms that can appear in these bottles.

Bacteria and bottles. Precisely, it is also a recurring theme, since logically on the surface of the bottle you can accumulate different common microorganisms like for example Escherichia coli either Staphylococcus. This is something that can be common, especially when a sugary drink has been stored, which leaves a substrate on the plastic walls, as if it were a Petri dish.

But the key in this case to avoid the accumulation of bacteria logically lies in hygiene. Recent studies show that regular cleaning Soap and water is enough to keep the bottles safe. In cases in which high levels of bacteria have been reported, the analyzes always point to the lack of frequent washing or the use of cracked containers, rather than the rational reuse for drinking water as many of us do at home to avoid having to buy more bottles.

Is it dangerous to reuse bottles? With this evidence, we can have several clear conclusions. The first of them is that there is no health prohibition when it comes to using bottles that are reusable and that have been manufactured to contain water. The second is that the associated health risks are almost exclusively due to poor hygiene habits or extreme wear and tear of the packaging. And the third is that if a bottle has not been manufactured to give it more than one use, Yes, we must be careful with its reuse..

In this way, neither the migration of bisphenol A nor the “bacteriological danger” justify throwing away your bottle after a single use, as long as it is used sensibly and basic hygiene is maintained. Science supports responsible use and regular cleaning, debunking some of the alarmist discourse around reusing plastic bottles for tap water.

Images | charlesdeluvio Nigel Msipa

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