Does anyone have one of these? And are they safe? I am probably being thick, but do they really work by adding water at 37 degrees to formula powder? If yes, how can that be safe? [[http://www.kiddicare.com/webapp/wcs/stores/servlet/productdisplayA_2314_10751_-1_14601_107965_10001_ Bib'expresso]] [http://www.youtube.com/watch?v=egvXwJkbYHk&feature=related how it works]] Am I missing something?