PXD UX Lab has designed the Magic, a bottle which instantly turns tap water into vitamin water. The Magic's cap contains a secreted vitamin tablet that dissolves as soon as it hits water. To release the tablet, one only has to press down on the cap. This should make it easier for folks to both take their daily vitamins and drink more water.
From the looks of PXD UX Lab's initial design, you'll need to provide your own vitamins for the Magic. This shouldn't be an issue if the cap is refillable and the bottle isn't made of plastic. Carrying around a ton of pills all day and remembering to take them can be tough. Getting your daily dose of vitamins would be a whole lot easier if you could simply press down on the cap of your water bottle.