My daughter uses this water bottle for sports. When you fill the bottle halfway with ice and then the rest of the way with water, the ice usually only lasts around 2 hours. I thought it may keep drinks colder for longer since it was insulated. If you continue to hold the water bottle upside down after taking a drink, it will leak every time, but if you immediately set it upright, it is fine. It is quite durable – it gets tossed around in bags and in cars and hasn’t leaked. It has been just what she needs for sports games and practices!