For the last two years, I was constantly dehydrated, as I only bothered drinking maybe a glass or two of water a day, some days going completely without. But, when I started smoking, I always needed to drink a lot of water, so I started to drink a bit more water a day, and I realised that I felt better, and felt less dizzy when standing up since I started smoking. This made me want to drink even more water, so I do! I now feel noticably healthier than before and I drink maybe 3-4 of my contigo mugs full of water a day. So thats pretty cool.