Dumb question: How do you keep the food warm?

Why'd you put him in a bag? I'd be worried that he could get hurt without me seeing.

I live feed but watch to be safe, just curious about the bag. I am not trying to say it's wrong as I am new to snakes, just curious if I missed something.

Don't listen to Petsmart. They really steered me (and a lot of others) wrong when it comes to food, habitat, etc... I think they mean well, they just don't know what they're talking about. This site has been invaluable for helping me learn proper BP husbandry.