I bought this bottle, $90 aluminum premium quality baby. App included. Keeps water cold all day long. Its light turns on when I need to hydrate. It tells me when I need to drink, it’s marvelous technology. Revolutionary. I‘ll never ever dehydrate again. It’s a superpower. I cannot live without it, best money I’ve ever spent honestly. I’m also paying $5/mo. to get cooler light colors, because I’m not poor like you. Imagine being poor. Even worse, imagine being dehydrated.