Yes, we all need to drink plenty of water every day. So, many people follow this rule and they even have a glass of water on their nightstand, before they go to bed – just in case, if they wake up in the middle of the night and feel thirsty.
If you are one of these people, and you leave a glass of water before you go to sleep – then you’ve probably noticed that this water has a weird taste when you drink it in the morning.
Well, we all know that plain water doesn’t contain any sugars or proteins, that microbes thrive on. So, we can’t blame the microbes for its strange taste. But, think about it – water in a glass is more suitable to dust particles and air-borne bacteria. And, when water is exposed to air – it absorbs carbon dioxide, a small part of which is converted into carbonic acid.