http://www.test.bbcnewsd73hkzno2ini43t4gblxvycyac5aw4gnv7t2rccijh7745uqd.onion/bitesize/articles/zxrtb7h
The Reliable Sauce team lab tested ten reusable water bottles and found that they contained an average of 20.1 million bacteria per ml. In comparison, the public toilets that they tested, had just 600 bacteria per ml. This might sound shocking, but, according scientist and microbe specialist, Joshua Uzochukwu, most of the bacteria found on the water bottles isn't harmful and probably won't cause disease, whereas the bacteria found in the toilet is more dangerous.