I put mine in a small prescription drug tube. I drilled a hole in the top, then stuck the probe through, then foil taped the lid. Thia way the probe isnt touching any plastic, its dangling in the air of the tube. That way I can tape the tube to the flexwatt and get a reading of the air inside the tube instead of the plastic...Afterall, I need to know my snake is in a warm environment, not in warm plastic. I found that taping the probe directly to the flexwatt causes artificial high reading and teh thermostat doesnt heat the tub appropirately. the thermostat may read 105* and the tub is at 79*...so, I tried this method and noe the tub and the therm are right on par...