Keeping water cold in a water bottle?

Question

I stand on my feet all day in a VERY dry retail environment and get 2 breaks in an 8 hour shift. I am allowed water in a drip tight water bottle. How do I keep the water cold since I understand it's bad to freeze water in a plastic bottle?

Answer 1

wrap the cold water bottle in aluminum foil.

Answer 2

Hmm...I was going to suggest you freeze the bottle half full with water then fill the rest up in the morning. But that's bad? News to me...I do that all the time. I love having cold water all day.