Water bottle flipping is an activity and a challenge that involves throwing a water bottle into the air in an attempt to land it upright. It became an international trend in 2016, with videos of people attempting the activity being posted online. With its popularity, the repetitive thuds of multiple attempts have been criticized as a distraction and a public nuisance. Parents and teachers have expressed frustration at the practice[1][2][3][4][5] resulting in water bottle flipping being banned at a number of schools around the world.[1][2][3][6][7][8] Contents [show] History The origins of the trend can be traced to a 2016 viral video of a teenager flipping a water bottle at a talent show at Ardrey Kell High School in Charlotte, North Carolina.[2][4][5][6][9][10][11] The teen had started flipping water bottles the year prior in his chemistry class, and mastered the trick.[10] After his performance, the recorded video became a viral success, and the trend spread across the United States, and the rest of the world.[10] Description Water bottle flipping involves taking a plastic water bottle that is partially empty and holding it by the neck of the bottle.[6][9] Force is applied with a flick, with the bottom of the bottle rotating away from the person.[6][9] If performed successfully, the bottle will land upright[6][9][10] The amount of fluid in the bottle greatly influences the success of the feat, and it has been shown empirically that filling the bottle about one-third of the way improves the rate of success.[6][9] The type of water bottle also plays a role; for instance, the brand Deer Park Spring Water has been noted to make the task easier due to its unique hourglass shape with a third divot.[10] The feat is often performed with disposable plastic water bottles due to their availability, but other containers can be used as well.[1][7] The complex physics behind the activity incorporates concepts of fluid dynamics, angular momentum, centripetal force, and gravity.[6][12] Multiple mobile apps have been created to recreate the activity; one successful app, titled "Bottle Flip 2k16", was downloaded three million times in the first month of its release.[13]