Yep, good point... I always use a CB70 or same-size Sterlite plastic tub for adults, and it's similar to having a UTH on one end. I use CB70s in my rack, pull them out, and snap the lid on, and place them with one end on the ThermaCare back-size heatwrap. I use smaller ThermaCares in my file carrier or styrofoam coolers; the containers are still big enough to allow the snake to move away from heat.