My daughter uses this bottle at school and she loves it. She said it keeps her water cold for the entire day and the ice is still formed at the end of her school day. Her previous water bottles did not keep her drinks cold all day and the ice would be melted. She also said the straw does not make noises when she is drinking from it and her other cups did. The bottle is also a perfect size to fit in the side pocket of her book bag. She is very happy so that makes me very happy!