Droppler! ​

Startups are becoming a bigger part of CES every year.

Eureka Park, a  section devoted to small businesses, has grown every year its inception in 2012. This year it hosted 500 exhibitors, up from 375 last year.

The ideas span a wide range, from retina-reading luggage to coffeemakers that can print photos into the foam at the top of the cup.

One unique idea is Droppler, from California's Nascent Objects, which measures water consumption by listening to how much noise a household's taps make. The $100 US device then syncs with an app, where users can see exactly how much water they're using.

"You/we'd be surprised how much people lower their consumption once they can actually visualize it," says company founder Babak Elmieh