Personally I am sick of having to check my cart ever time i get a dry flavor to see if the top piece is melted....with a cart made of heat resistant material, theoretically one would no longer have to align the bridge, either...I know what a lotof you are thinking:drip, juicebox etc. but i really like the convenience of a cart. I have no idea how manufacturers overlook the possibility of plastic fumes when making a healthy alternativeto something.