No, the classroom temp is kept at 78. It keeps it cold longer in the classroom than the Polars do though. I'm waiting for my Polars to die so I can justify buying more. I have a whole cupboard full of Polars though.

I haven't tested it on the bike, so can't give numbers there. It's the bottle I leave in the car cooler so I have cold water AFTER the ride.

Veronica