Drinking enough water -- experts recommend eight glasses a day -- is pretty difficult. After seeing research suggesting that 80% of the French population doesn't drink water because they simply forget to, Ogilvy Paris and Vittel created a fun way to remind people that it's time to drink.

A "Refresh Cap" on each water bottle featured a little timer that sets itself every time you screw the cap shut. Once an hour is up, a "flag" pops up, reminding ou its time to take a sip or two.