Inquiring minds want to know, do all Canadians put vodka in their water to prevent freezing? Or just the banana belt folks....
:D Well, I've never tried that but I can't speak for all Canadians. I have tried electrolyte drink instead of water since salt water freezes at a lower temperature. But mostly, I just rely on insulation of my bladder, hose and mouthpiece, and I blow air back into the drinking tube to dry it out after every drink. It works fairly well but if I forget to drink often enough, things sometimes freeze up.
'Bent will sometimes put a warm drink in his bladder. He used to put the mouthpiece inside his clothing until The Great Winter Adventure Race Incident.
That day, the mouthpiece came off and dumped 2 litres of fluid inside his jacket when we were biking at -20C. We hadn't even arrived at CP1 yet and we assumed our race was over. It was obviously a serious hypothermia situation. Except... as we got closer to the CP, 'Bent started feeling warmer. He realized the fluid had frozen into a solid block of ice that encased the front of his fleece vest. He had a rock hard (and very heavy) shield over his abdomen. His wicking base layer had done its job and he didn't feel too wet. So we continued and finished the race. His ice shield didn't thaw out until well after the awards!