It could end up making you sick, and there’s a really disgusting reason for it.
Charles Gerba, PhD, a professor of environmental microbiology at the University of Arizona, told Men’s Health:
Colonies of germs are living in your favourite cup.
According to his research, 20 per cent of office mugs actually carry fecal bacteria, while 90 per cent are covered in other kinds of germs - and they can live for up to three days.
It usually happens when people clean their mugs with office sponges that have been sitting around for a long time, or don`t use hot water and soap.
As well as that, if your mug sits on your desk unwashed, bacteria will start growing right away – even if if there’s nothing more than a coffee ring inside.
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