I have the podium ice bottle. I fill it with water and then freeze it. It's my daily water bottle at work and the water is still cold at the end of the day. My classroom temp ranges from 72 - 78 and the bottle sits on my desk

There is a stainless steel insulated version. My husband did a test with the stainless steel and a couple of other bottles to see how they all compared. You can read about it here.

Veronica