I think that everyone can agree that water intake is a tough one and being accountable is how it is done which, eventually, will become a habit. You will know when that happens if you are without a water bottle any longer than a couple hours! The way I approach it is unique because I am retired and have access to my water jug which holds 4 litres. It is still not easy to remind oneself even with it at your fingertips. For all those who have incredibly hectic work days/schedules, it is on you to find what works for you. Where there is a will, there is a way! When I am travelling, the water bottle(s) get filled plus an extra jug if it is a full day outing. Never leave home without a source of water, your brain will thank you.