I love this water bottle so much! The water out of our sink does not get cold at all so I keep a pitcher in the fridge. I also put my daughter and my water bottles in the fridge every night. This water works as well if not better than hydroflask! My daughter has a hydroflask and I can honestly say we've left this in the hot car all day during the heatwave (black car so it was HOT) and the water was just as cold as it was when I pulled it out in the morning! I'm very very impressed with this water bottle. It has a nice wide mouth so it's easy to clean at the night and I don't have to worry about losing the lid. Plus no worries about plastic! A must buy!!