Beware of Bevi machines, buds. I'm Diamond Naga Siu, and I'm an avid water drinker. But I don't like bubbly drinks (they hurt my mouth) or flavored water (just drink juice).

So there is very little I like about the Bevi machine in Insider's New York City newsroom. It's a high-tech, touchscreen water cooler that can dispense still or bubbly water with your choice of flavor.

Now, I have a legit reason to dislike it. The innocuous-looking water dispenser is tracking us. Some investors and hedge funds are looking at Bevi usage data to track return-to-office trends.