Objective: How can I have ice cold water in my water bottle from home?

Which of the following solutions is more sound in terms of naive physics reasoning?

OPTIONS:
- Fill bottle 1/3 way with water, lay on it's side freeze, then fill with cool water when you leave the house.
- Fill bottle 1/3 way with buttermilk, lay on it's side freeze, then fill with cool water when you leave the house.
Fill bottle 1/3 way with water, lay on it's side freeze, then fill with cool water when you leave the house.
Mål: Hur kan jag ha iskallt vatten i min vattenflaska hemifrån? Vilka av följande lösningar är mer sunda i termer av naiv fysik resonemang? ALTERNATIV: - Fyll flaska 1/3 sätt med vatten, lägg på dess sida frysa, fyll sedan med kallt vatten när du lämnar huset. - Fyll flaska 1/3 sätt med kärnmjölk, lägg på dess sida frysa, fyll sedan med kallt vatten när du lämnar huset.
Goal: How can I have ice-cold water in my water bottle from home? Which of the following solutions are more sound in terms of naive physics reasoning? ALTERNATIVE: - Fill bottle 1/3 way with water, put on its side freeze, then fill with cold water when you leave the house. - Fill bottle 1/3 ways with buttermilk, put on its side freeze, then fill with cold water when you leave the house.
Fyll flaska 1/3 sätt med vatten, lägg på dess sida frysa, fyll sedan med kallt vatten när du lämnar huset.
Fill bottle 1/3 way with water, put on its side freeze, then fill with cold water when you leave the house.