I've transported them in Critter Keepers and tubs with vent holes. If you do this, make sure you cover it with a t-shirt or something to keep the sun from shinning directly into it. I also set the Acu-Rite in the front seat and run the probe into the carrier so I can watch the temps in the tub and truck and keep them around 75-78 or so. Whichever way you choose, just don't set them on the floor unless you have something thick like a comforter or blanket folded up down there. Floorboards can get alot hotter than you think...