The OFFICIAL Cup of Fitness Informant comes from our friends at Ice Shaker (as seen on Shark Tank!) These Ice Shaker Cups are the highest quality shaker cups you can buy! These cups are double walled, vacuumed sealed stainless steal to ensure your drink stays cold. In fact, the Ice Shaker Cup can hold ice for 36 hours! Even better, since these are stainless steel, the bad odors from your supplements cannot penetrate the material giving you that disgusting smell.