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It's the middle of summer, and we're all looking for a better way to stay cool. Some months it seems like there's no easy solution: Either you suffer through the long, hot afternoons or brace for the shock when the utility bill comes due.

Luckily, there's a middle path. There's a certain amount of waste involved in heating the entire house with your central air conditioning, especially when you might only use one or two rooms for the majority of the day. Many people are now using personal AC units to cool down only the rooms that need it for the specific hours they need cooling.

If you're looking for that kind of efficiency, there are few models like the EvaChill EV-500 by Evapolar. Evapolar's previous cooling systems have gotten lots of notice for their sleek profile and simple operation, and the EV-500 is no exception, picking up a Red Dot award for design in 2019.

It's portable enough to sit innocuously on any desktop, and the soft blue LED accents lend a touch of zen to any room. For fuel, it uses one of the most plentiful resources around your house: Plain tap water. Just fill it up, and it can lower the temperature in most rooms to 59 degrees in as little as 10 minutes.

Better still, it humidifies the air and filters out dust and other allergens as it does so. That is thanks to a unique filtration system that cycles the water through a series of cooling pads. Unlike other personal AC units that can ironically heat up as they operate, the EV-500 runs cool and quiet.

With an integrated handle and simple, one-button setup, this innovative AC can provide cool comfort just about anywhere. The best part? It's now available for a full 19 percent off the original retail price.