The Larq Purevis 2 bottle doesn't accurately measure the volume of water you're drinking, because it doesnt always communicate with the app, as it should.I thought mine must be faulty, so they very kindly sent me a replacement cap - but the new one is exactly the same, so it's clearly a design flaw. Sometimes it registers that you had a drink, other times it doesn't.So my advice is, its not worth paying extra money for the Purevis 2. Just get the cheaper Purevis to purify the water. The hydration tracking is essentially useless. There's also a YouTuber who ran a test that demonstrates that perfectly.
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A self-cleaning water bottle that'll help you reach your hydration goal. Neutralizes up to 99.9999%* of harmful, odor-causing bacteria using UV-C light.