I have heard of the cold mug thing but i heard it different. I will post the difference later after i ask my buddy ( the one who originally told me) I do know that a decent way to get a good hash hit is to take a pin, a clear glass, and a cardboard square
( that's just big enough to cover the the cup). stick the needle through the center of the cardboard, place your chunk of hash on the pin, light it let it burn a little bit and palce the cup over it. Once the cup is filled with smoke, slide the cup off of the side of the cardboard and suck the smoke out of the cup. I like this way better than the rest for some reason.