Luckily at my job they have water coolers! So I have a glass with me everywhere I go, I have found that if I add lots of ice and make it really cold then I am able to consume much more.
I think the dry mouth is actually a good side effect-before I rarely ever drank water and now I love it and dont drink anything else! I like mine ice cold too! Sometimes I put my water bottles in the freezer for awhile.