VIZcap is an interesting new bottle cap design that allows vitamins or other supplements to be added to water just before drinking in an effort to maintain potency.  The supplement is kept in a moisture tight compartment at the top of the bottle.  Once the safety seal is removed the supplement is released by simply hitting the top of the bottle.  The website has some interesting video on the development process and how the final bottle works.  The creators are looking to sell the idea to big beverage manufactures.  They shouldn't have much problem.  They have an attractive and easy to use design, complemented with  clean graphics and a nice promotional website.