I went to Costco and picked up 2 packages of their Citgo water bottles. They came with 3 in each package for a total of 6 different colors. They hold up to 24 oz of liquid. I assigned each of my family members a color and I get up in the morning and fill each one up and set it on the table. They love the bottles and we are all drinking a lot more water. And it is easy for me to keep track of how much I'm drinking a day. I average 3 bottles a day, which is an equivalent of 9 8 oz cups of water.