Refresh Cap

http://bigumigu.com/haber/vittel-siseleriyle-su-icmeyi-hatirlatiyor Ogilvy Paris Innovate an Irresistible Way for Vittel to remind people to drink the recommended 8 glasses of water a day. 'Vittel Refresh Cap'. A tailor made cap that pops a flag every hour to gently remind you to drink. When you twist the bottle cap shut after your refreshing sip, a timer begins automatically.

A bottle that reminds you to drink water every hour. How convenient.