Unpopular opinion: I think those 'smart' water bottles that track your intake are a total fad, but my wife swears they're the future. | Fad or Future? - Vivisector
Wait, do you think it actually sends data somewhere? I'm pretty sure the tracking is just for you to see on the app... like a step counter that doesn't leave your phone.
My friend got a smart scale that uploaded her weight to a social fitness app without telling her. It was supposed to be private, but it shared a chart with her workout buddies. She was so mad. It just makes you wonder what else is quietly sending info out.