I’ve been using a big cup with a straw, one of the gigantic plastic Taco Bueno cups that my boyfriend got filled with root beer…and it’s really been working. I drink more and I drink faster through a straw, even from water bottles. I also drink more if it’s room temperature rather than cold…I enjoy cold water and it sounds good but it’s better in theory, it always kinds of chills me and slows me down. I guess my last tip would be to fill up on iced tea for a nice change..it’s just as healthy (I prefer to make my own loose green or jasmine tea in advance, not cold-brew black tea crap, although I still like the crap don’t get me wrong) and it gives me a boost that is healthy.