Your damp and dark reusable cups are the perfect place for mold ... Water. These water bottles, made from a plastic derived from crude oil, will take 500 years to decompose. That's if they end up ...

An open water-bottle lid, a flipped-up straw—if it’s exposed to the air, mold will see an opportunity and go for it. If your water bottle has slimy black or brown gunk inside it or in the ...

Article continues below But just how does mould end up in water bottles? Per HomeCleanse ... some of which float away on air currents, seeking new places to settle and grow.

"I soak all my children’s water bottle tops in Milton and water and I’ve never had a problem with smelly tops of mould build up. Works great," a second agreed. "Soak in a Milton tablet ...

On a popular app, Fizz, students have confessed to cleaning their water bottles only once every several months, and Yale researchers weighed in on the potential dangers of mold exposure. For Yale ...