As a fitness girlie who loves ice cold drinks after a hot workout, I never thought that I would ever replace my Stanley cup. The Stanley IceFlow had been with me for years and was my companion over thousands of digital miles in cycling classes. But here I am. A new woman with a new water bottle. How did this happen to me? This story is part of Gift Guide, our year-round collection of the best gift ideas. I didn’t become an Owala fan overnight, but instead the transformation took place…