how long can they go without heat?

[Manwell]

I work at a pet shop and I'm having a reptile (display) day on Saturday, I would like to take my pacman for the day, apart from taking his whole enclosure and set up what would be the best thing to take him in and how long will he be okay without heat?

Thank you

[reptifrog]

what about heat packs? I had one in the box mine came in when delivered stays warm for a few hours