To get my 8 cups of Water in a day, I have a water bottle Fresh and Fit Vortex it has 24 oz of water it holds. I fill it with water, only 3 times a day and I'm not always waiting to get to a sink to fill up a smaller bottle or glass. If I go somewhere I put in the ice in the vortex it came with.
It's easier to see that you only fill up something 3 times instead of 8times or more to get your water for the day. It's just a little trick I play on myself to get the water.