Refilling water bottles: is that safe?
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Refilling your water bottle every time is cheap and good for the environment. But sometimes you hear that it would not be safe to reuse plastic water bottles, because of the bacteria or because of dangerous substances that end up in the water from the bottle. A water bottle that is continuously reused can contain millions of bacteria if it is not cleaned properly. Especially on pull-out caps there are many, because they are difficult to rinse clean. Fortunately, these bacteria are usually harmless. It is your own bacteria from meal residues and saliva and the chance that you will become ill is very small.
Chemicals
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Plastic bottles contain chemicals that may end up in the water, such as BPA. Under normal circumstances this hardly happens and it concerns very small amounts that are not harmful. High temperatures, such as keeping the bottle in the sun, can cause this to increase. Carbonated drinks or acidic drinks such as fruit juices can also ensure that more substances from the bottle end up in the drink. If you don't want to use a plastic bottle, you can opt for glass or stainless steel. These are materials that hardly release any substances.
Bottle from the sun
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To minimize the risk of getting sick, it is best to use the bottle only for water. Change the water regularly (preferably daily) and do not keep the same water in it for days. On hot days it is wise to keep your bottle out of the sun and if possible, put it in the fridge. It is better not to leave it in a hot car. Because of the heat, bacteria grow much faster and substances from the bottle may end up in the water in very small quantities.
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Clean water bottle
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Cleaning your bottle (including the cap) is best done by rinsing it well with warm water and a drop of washing-up liquid. If possible, do this every day. This slows down bacterial growth. Rinse well with cold water. Or put the bottle in the dishwasher together with the cap.
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Cleaning your bottle (including the cap) is best done by rinsing it well with warm water and a drop of washing-up liquid. If possible, do that every day. This slows down bacterial growth. Rinse well with cold water. Or put the bottle in the dishwasher together with the cap.