I bought a new water bottle for my 3.5-year-old daughter yesterday. She saw it during the dinner, and wanted to go back the daycare with the new cup right away. This morning she woke up so early by herself, not her style at all. Now I know why. She insisted on carrying the new bottle on her own. Once arriving school, she showed it off to her teachers, without saying a word. The teachers said, "Wow, you got a new bottle". She seems very happy about it. What a simple life the small kid has!