My wife and I have been using our Hydro Jugs for about 3-4 years now. They last a really long time, but we decided to pick up some new colors within the past few weeks. They hold 73 oz of water, and have convenient carrying options as well. I don't use the straw option, but my wife absolutely loves it. The wide opening makes for easy ice-adding, and the convenient shaker-style pop top makes drinking easier.
One of the things that made the biggest difference for me was the wide opening. It allows me to use these reusable ice blocks to keep my water cool while not sacrificing my fridge to massive ice production.