Between fitness bands, apps, and journals, there are a lot of ways to keep track of calories. But all those things require you to do work.

You might want to try the very first smart cup.

Unlike old standby methods, Vessyl, a 13-ounce thermos-like container, does all the nitty gritty for you. Just fill it with liquid (coffee, smoothie, wine) and a genius sensor will detect exactly what that liquid is and then display its nutritional content (calories, sugar, protein, etc.) on the side of the cup.

Can more transparency help you drink more water? We put the device to the test: Within 10 seconds of filling up our Vessyl, it recognized Diet Coke, Vitamin Water XXX, Mott’s apple juice, Gatorade Frost in Glacier Cherry, plain old water, and a few other beverages—all by name. It can even tell the difference between strong and weak coffee.

This thing will also tell you just how many eight-ounce glasses of water you’ve had each day. (You should be shooting for eight.) But beware: It knows how many glasses of wine you’ve had too.

Available for preorder ($119).

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