We all know that plastic bottled water is a huge problem these days. And it’s a big reason why so many of us turn to reusable BPA-free plastic, stainless steel or glass water bottles that we can simply refill again and again. The easy to sip, spill-proof tops that so many different bottle varieties come equipped with now are also another added convenience.
But how often do you give your reusable water bottle a real thorough cleaning? Not just quick rinse before heading out to the gym — but a really thorough scrub down with soap in all the difficult nooks and crannies? If you’re like most people, you probably do it once in a while, but not daily or even weekly.
It turns out that the number of germs lurking on many reusable water bottles is actually right on par with your average toilet seat. Pretty gross, right?
To get an idea of how many viable bacteria cells might be crawling on a typical person’s water bottle, fitness experts at Treadmill Reviews conducted a study that involved taking swabs from the lids of 12 different water bottles belonging to athletes. After the athletes had used them for a week without washing them, what the researchers found was pretty alarming: The average number of colony-forming units (CFU) per square centimeter on the bottles came to 313,499.
To put that into perspective, your dog’s favorite chew toy has about 2,937 CFU per square centimeter. That’s right — licking your dog’s favorite toy is likely to be safer than drinking from your reusable water bottle that hasn’t been cleaned recently.
Of the 12 bottles involved in the swab test, all of them had different caps to drink from, which made a pretty big difference in how many bacteria were crawling on them. Slide-top water bottles turned out to be the big, disgusting winner — coming in at a whopping 933,340 CFU per square centimeter. Straw-top bottles had the least number of germs at just 25,4 CFU per square centimeter.
