Attention Brits! Blaine is an "illusionist"! He isn't really going to sit in that box for all that time without food. I'm sure he is watching a good bit of the media coverage from the comfort of some 5-star hotel room.
Blaine may be an "illusionist" in the loosest sense of the word, but he really is sitting in that box and will do so for the 44 days. Unless he fails in making it that long.
Just as his NYC stunt where he was in a block of ice for how many days I can not remember. He really was in that block of ice. And anyone could have done it. Its easy. You would think it would be very cold in there, but in reality it is pretty warm. If it wasn't warm, then igloos wouldn't have ever been used. But they are used, because they provide warmth!