Vittel Refresh Cap 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. Nothing new to do just twist the cap as you used to do but this time utility has been added.